Brewfather measurements


I have been brewing beer…
Tilt, Plaato and MyBrewbot are discussed

Updated with new things

Odd title, if you know nothing about brewing. The way I have been brewing – is likea glorified science experiment. Being scientific about brewing means planning, measuring, monitoring and adjusting to get the right biochemical reactions to take place and avoiding unwanted side effects.

Brewing is both art and science. The art is in the design and making of wort and the science is mostly in the fermentation and conditioning

Click image to visit the Brewing Page

The art is akin to cooking. Easy to cook a meal that is edible but to make something that excites people takes training and dedication to learning the art. I think the art applies up to the point of fermentation. From then on it is largely a matter of processing. If you do not get the basics wrong then the yeast does its work and you do not spoil the result. Again it is like cooking where the preparation is finished off in a well prepared oven.

It is hardly surprising that brewing and cooking are similar because beer is really just food that you drink. Enough of that.

This article is about my experiences with Brewfather software and measurement tools for temperature, pH, Specific Gravity and general fermentation progress.

Does measurement matter

This is more a matter of opinion than fact but I do think that measuring matters. For me the key is to be able to have a repeatable process that I know works the way I want it to. There is a lot of received wisdom in brewing that is rooted in circumstances that may not apply to me. Therefore, developing a process that works for me is a matter of trial and assessment of the results. Measurements help me to understand what is happening in the brewing and most importantly the fermentation stage.

Reviews – sort of

These are my personal reviews of the usefulness and effectiveness of the tools. There is a rough order of importance to me. I have not tried to review all the features available but have focused on what matters to me.

Brewfather

This is quite an outstanding piece of software. I looked hard at BrewSmith and other software and found Brewfather to be much more usable and greatly flexible. The monitoring tool for fermentation is very sophisticated. Support when I needed it. It works on all browsers I have tried.

Fermentables and additions
Hops and yeast
Mash and ferment profiles

The software helps tracking inventory of malt, yeast, additives and hops. I offers alarms to guide you through multi step mashes, boils, ferment and conditioning. These are convenience features that work for me. There are profiles for different mash and fermentation styles that can be heavily customised. Here is the link to the site if you want to try it yourself. https://brewfather.app/

Style characteristics in Brewfather

Recipe design is a highlight for me. The ability to adjust ingredients and the process and see the effect of any change on the characteristics of the brew has helped me to better understand what I am doing and to make better choices. Adjustments to water are difficult and time consuming to calculate manually, however Brewfather has a very neat tool for helping decide what adjustments to make to achieve a specified target profile per type. You can select your desired BJCP style and the software shows a graphical representation of they key parameters for that style. The final gravity in the image above could be increased to the recommended 1.010 by shortening the beta amylase step in the mash by 5 minutes.

Fermentation tracking

Fermentation tracking is what attracted me to Brewfather in the first place. The graph above shows a recent brew tracked by a Tilt device. The wort was at around 22 degrees when I pitched the yeast and started tracking. The main ferment had finished in 5 days at a fairly constant 17 degrees. It is very useful to see the progress of the fermentation.

Pros

  • The recipe designer and water analysis are a highlight
  • Graphing of fermentation progress from Tilt devices
  • Alerts for mash and boil tasks
  • Frequently improved with updates
  • Support via facebook
  • It is in the cloud and therefore easily accessible out of home
  • Free version is highly functional

Cons

  • Still being developed so you may find some inconsistencies
  • Subscription service required for the advanced features
  • You need to integrate monitoring devices to track fermentation (not too hard)

Tilt

This is a really good product that has a few small things to iron out. It does what it says it can do and is quite easy to setup. Probably the best available measuring tool for fermentation.

The Tilt is a small cylinder that does what the name suggests. It tilts in wort and the angle of that tilt plus the temperature gives a good indication of the SG of the wort. A good estimate – not accurate. But then who really needs accurate because the SG is a given not something you can control. The final measurement with a refractometer is the true final SG.

Using a Fermentasaurus and an IR thermometer to check the Tilt accuracy for temperature measurements, I found the Tilt to be very accurate. It still needs calibration to adjust for around 0.2-0.3 degrees C.

I found the Tilt easy to setup and use. I also found that I needed to get an automatic logger to take readings otherwise I would have to be constantly moving to the fermenter to take readings.

Two technical issues mean that readings can be highly variable. Firstly, bubbles and krausen can stick to the side of the Tilt and alter readings for SG.

Cleaning and sanitising the Tilt has been simple and this is important for a device that sits in the wort/beer the whole ferment. Battery life seems ok for at least half a dozen ferments but changing the battery requires re-calibration.

Calibration is a little bit tricky. Instructions try to simplify the calibration process but I found that I needed to pick several temperatures and SG points to get decent accuracy. I used sugar solutions of SG 1.010, 1.021, 1.032 and 1.045 to calibrate the Tilt. With just the suggested 2 – tap water and one other (1.019) I found that the higher gravities were showing odd readings, out by 0.005 or so.

A new Tilt App is available that is slightly better at calibration, however it is in advanced beta and changing rapidly so I cannot be sure of its performance yet. It does nave a local logging feature that could be useful, however requiring that you dedicate a device to the task.

This is the most useful measuring tool I have yet seen. It saves all that mess and fuss of taking samples of the wort and measuring then cleaning everything. It also means less chance of allowing air and contaminants into the fermenter. I use two Tilt devices. One for the primary ferment and one for the secondary ferment. Each is a different colour and can be tracked independently. If you wish you can track up to eight fermenters with different coloured devices. See also: https://tilthydrometer.com/ 

Pros

  • It gives a direct measurement of SG and temperature from within the wort
  • Operates via a phone or tablet
  • Has the ability to log to cloud services
  • Quite well designed by brewers
  • Supported by Brewfather and several data logging platforms

Cons

  • You have to manually approach the Tilt with your phone to log readings or get add on loggers like Tilt Pi or MyBrewbot to log for you
  • Bluetooth range is poor through stainless steel fermenters
  • SG readings can be out quite a bit during vigorous fermentation
  • Battery replacement is a PITA
  • Current logging devices are immature and buggy

Plaato

Plaato is a very nice looking piece of equipment and attractively designed. It does, however have some serious issues, some of which have been addressed and others are part of the design and will not be fixable. Software is in beta still so has a few issues – none too serious. however, the concept is quite good and the ability to track when fermentation starts and changes pace.

From my experience, it seems that the Plaato device was designed within the paradigm of fermentation in carboys that are placed in refrigerators. I use a Grainfather Conical fermenter with internal heating and external glycol chiller that keeps the ferment within 0.5 degrees of target (once the temperature stabilises).

In an Australian Summer, I had the Plaato showing 34 degrees at the time a Tilt was showing 17.3. The fermenter was set to 17 +- 0.5. The temperature on the Plaato cannot be relied upon except when using a refrigerator to control fermenter temperature. The Plaato website does not mention this at all, as far as I could see.

This is the opportunity to mention that the Plaato was a kickstarter funded product. The website reflects that marketing approach, emphasising uniqueness and features and a bit of science mumbo jumbo. A silly thing that they have on checkout is a statement Free International Shipping ($20) – whatever that means.

Another serious problem is that the airlock allows the water and and air to suck back to the fermenter as the wort cools from pitching temperature to stable ferment temperature (ie from 21 degrees to 17 or so). Fermenting a lager would exacerbate this issue. The same things happens when cold crashing. Plaato have now come up with an add on valve to help (but not completely) solve the problem. IMHO it needs to be included.

Despite the faults I found, I do like the app and its ability to show me what is happening with the bubbles. Instead of the logging problems I experienced with the Tilt (ie having to be at the fementer to manually initiate a measurement) the data is right there in the cloud. Once the app improves a bit this should be a very useful feature.

Pros

  • It is easy to setup
  • The app works quite well for beta software
  • Monitoring of fermentation once the ferment is at a steady temperature and bubbling is good
  • It is external to the fermenter and uses a bung thus avoiding issues with wifi signals

Cons

  • Temperature measured is only ambient temperature. Nothing like the temperature of the wort unless you have the fermenter in a refrigerator or similar
  • The water reservoir sucks into the wort if you cool it even a couple of degrees
  • The app shows bubbles per minute on a scale that means you cannot see much for most of the ferment. It should be auto scaled to show meaningful graph curves
  • Measurements are not good enough to use for accurate tracking and comparisons between batches – temperature needs to be measured by another device
  • You need to have the device tethered to a USB cable for it to operate. not quite a convenience feature

MyBrewbot

This is a promising device for logging Tilt devices. The product is still under development but seems to be heading in the right direction. The device is simple (especially compared to the Tilt Pi mess) and easy enough to setup. I have marked it down because I could not get the cloud logging for Brewfather working. Regardless, the app allows monitoring remotely and that works well enough. I expect improvements over time.

The app has quite good analytics, albeit a little confusing until you get used to the interface and colour scheme. I expect to use this device regularly.

Pros

  • Easy to setup and add Tilt devices
  • Small and efficient device
  • Promising software

Cons

  • I could not get logging to the cloud for Brewfather to work
  • A few details need to be ironed out in the software and app
  • it needs to be close to the fermenter because of poor Bluetooth range through stainless steel and needs to be connected to a USB power cable

pH, SG and water in general

Pros

Cons


Consulting Now!

You must see the big picture so that the small things go in the right direction.

From Alvin Tofler – Future Shock

Where is Consulting now?

Consulting used to be a fairly straightforward thing. A client had a problem and a consultant provided them with a solution that has worked before. Most of these simple problems are still around and there is still some consulting in that space. The challenges we are dealing with today are huge and “wicked” problems that require more than cookie cutter approaches to deliver results. Some of these challenges are:

  • Existential crises – Climate Change, water security, food etc
  • Population health – Diabetes, ageing diseases etc
  • Inequality – First World poverty, Indigenous people, Equal Opportunity

The common theme for all of these challenges is that they are complex and anything you do changes what you are observing. They are Complex Adaptive Systems.

Meeting the challenge

Complex adaptive systems challenge simplistic cause and effect analyses, instead being interactions between dynamic processes. Interactions between individual parts both affect and shape the system as a whole. A change to one part of the system can have disproportionate impacts on the system as a whole. Positive interventions produce a Virtuous Cycle and negative interventions produce a Vicious Cycle. Finding the right levers to move, and why they are the best ones, is the primary challenge.

Focusing on just the most complex and challenging end of consulting, where we are dealing with Complex Adaptive Systems ie diabetes or entrenched poverty. Here are the key principles:

  • What we know is usually dwarfed by what we do not know
  • Cause and effect analysis will not usually give reliable results
  • Generalised approaches (aka one size fits all) often fail when transported to a different community and/or context
  • Most of the time the slowest way to make lasting progress is to take shortcuts
  • Declaring success without objective evidence to support any subjective evidence perpetuates the problem
  • Providing a technical solution to a human problem does not solve the problem – but can help solve it

Remembering that we are talking about large scale and complex problems, the most effective way to deliver results (outcomes if you like) is to take a structured approach that allows for a high degree of flexibility and builds in a comprehensive capability for learning and adapting. Because the way to learn is by intervening in some way and assessing the impact of that intervention, the shorter the cycle for such interventions the quicker the learning process.

The Toolbox

If the only tool you have is a hammer then all problems will look like a nail

Big initiatives require a toolbox rather than a single tool. Agile, Project Management and the vast majority of methodologies are focused on a single tool. Here are some of the tools we will need in the box.

Project management practice is embedded in the world of mechanistic cause and effect. You are aiming to plan to deliver something predictable and tightly focused (scope, timeline and budget). This is not the world of Complex Adaptive Systems.

Program Management sits in the world where we know what we want to achieve and need to get started while we work out how to best to get where we want. It is better suited to working within complex adaptive systems.

Portfolio Management is an overlooked but key part of any large scale initiative. It looks at where the value lies and makes the call as to which parts of the initiative (projects and programs) should be scales back, kept as is or enhanced, according to the results they have delivered and what new knowledge has been discovered.

Business Agility is a concept that Evan Leybourn has been promoting. Its focus is on building an organisational capability that enables quick changes in direction to address external challenges and emergent strategic problems. Even temporary (most Government programs exist longer than 80% of small to medium businesses) initiatives need to organise themselves to be able to adapt to change and new knowledge. See https://businessagility.institute/

Agile

Let’s start with what I mean by Agile. I mean using proven methods for getting a task done quickly while not skipping much that could be important. This is an embodiment of the 80-20 rule that suggests that 20% of the result comes from 20% of the work, following many similar effects observed in business (ie 80% of business comes from 20% or fewer customers).

Key agile approaches that have been useful:

  • Daily Standup meetings to clarify and progress
  • Kanban
  • Theory of Constraints
  • Future orientation for executives responsible for strategy
  • Dynamically updated business processes in response to stakeholder needs
  • Business and information architecture
  • Continually improved services

Some of the above would not be recognised as Agile by self declared Agile Practitioners. Those are taking a narrow view of what Agile means and may miss the opportunity to help an organisation to be agile (or nimble). The important thing here is that the Purpose of the organisation needs to respond to changes from within and outside. The Operations of the organisation need to respond to changing customer/client needs as well as the organisation’s needs. Emergent strategy is probably more important than any 5 year plan, given the rapid changes in business conditions.

A word on architecture. For a business, architecture is important and especially information and business architectures. Information drives almost every aspect of an organisation’s performance so it makes sense to have a very clear picture of what your information is, in terms of master data, custodianship and access (right to know as against need to know). Similarly, knowing how your business is structured, beyond just an organisation chart, makes it easier to make better decisions and build robust services.

DIKW

The hierarchy of Data, Information, Knowledge and Wisdom has a critically important role. Data must be collected on all meaningful activity. That data must be organised so that the underlying meaning becomes clear. Knowledge gained through analysis and engagement is then used to make wise choices as to where resources will deliver best value and what no longer should be done in order to free resources up for the higher value work.

Wisdom and, to some extent, knowledge are scarce. Sharing them produces flow on benefits for any organisation. Good practices, lived by staff, produce better outcomes than policies and procedures, which tend towards centralised control and limiting of sharing.

Design Thinking

When there is a clear articulation of what the problem might be, Some of the most useful tools for Design Thinking are:

  • Deep consultation with the people that matter
  • Client Journeys and scenarios
  • Deep Thinking
  • Management of cognitive biases

Design Thinking is a concept that came into being because of Wicked Problems. It crosses into other areas discussed here but the valuable part of Design Thinking is to “progress iteratively” from framing the problem too identifying needs and then taking both wide and narrow views of potential solutions so that leading candidates can be trialled for feasibility.

An example Client Journey

This is where the tools of Design Thinking come into play. There will always be some group or individuals who are more invested in achievement of an outcome than others. These are the ones who need to be heard and heard the most, because they will often know what should be done and how to make it work. They may not have the full picture but they will provide critical clues at a minimum. Consult deeply with them.

At the point where there appears to be one (or a small number) of opportunities to achieve your desired outcome you then have to decide which to chose and how to go about it. There are usually a large number of options available and it can be hard to choose between them. As with much of this article, the fastest and best way to do this is deliberately and to take enough time to plan properly. In the later section Show me the Value! the reason for this will be clear. Getting the Design right is extremely important.

Transformational Change

Transformational Change is another banner that crosses into the space of wicked problems that cannot be addressed by incremental change ie by improving what exists. Transformation happens when it is a matter of survival, in response to disruption or as a strategic initiative. I describe it as a journey to business as unusual. You do not want to be where you are or are heading towards. You want to be somewhere else and probably quickly rather than slowly.

The Consultants Toolbox

Consultants do a lot of things that can be applied to solving wicked problems and delivering high value in short timeframes. This collection of knowledge, skills and experience provides ready access to scarce capabilities that speed things up. Often considerably.

  • Facilitation of workshops, Agile activities etc
  • Analysis, especially multidimensional analyses
  • Presentation/persuasion skills
  • Written and verbal communication skills
  • Extensive knowledge of similar organisations and issues
  • Organisational change
  • and much more

Consulting Now! A journey more than a methodology

Show me the Value!

OK, so there is a process diagram that looks like methodology. Seen one – seen them all.

Still, a methodology is definitely a way of consistently delivering outcomes and provides a way to illustrate what needs to be done up front at a high level. So what is the value?

Methods guide what you do when. How you do it drives value

This and many other methodologies articulate a pattern that works in certain circumstances and require that there is an underlying capability to deliver to the methods described. Essentially, this means that the methodology has minimal value without the understanding, knowledge, experience and skills required to deliver.

In the end, value is what gets delivered so how do you know before hand whether you will get value from an initiative? Part of the answer is knowing that the approach to delivery has worked in similar circumstances and with similar clients is the best indicator that there will be value delivered. The next factor is to make sure you start out the right way; being rigorous in your early stage work and avoiding biases in any assessment. Finally, keep a team together with key people involved from beginning.

Once again, we should keep in mind that we are talking about complex, wicked problems. Value in these cases is less simple to define than with your traditional project with a defined scope, timing and budget. To get to grips with how value accrues for a transformation initiative you need a correspondingly complex approach to identifying value. A Value Chain/Stream.

Example Value Chain

A Value Chain like the one to the right works backwards from the end objective towards the objectives, initiatives and tasks that are required to deliver the outcome. This is done by asking what is necessary to do so that the outcome, objective or initiative can be completed. You then validate that the inputs are sufficient to deliver what is desired.

None of this is easy. The work may take weeks or more to develop such a Value Chain (sometimes called a roadmap) and it does take extensive consultation and analysis to get right.


When do you realise value?

Not as easy as you might think.

The takeaway is fairly straightforward. The 5% of your budget spent on working out what you MUST do, who needs to be part of the journey and laying out the roadmap for others influences 65% or more of the outcome. You need to plan things to work in your favour.

Dividing an initiative into three parts: Shaping, Design and Delivery, we can see that the early stage work has a disproportionate impact on results as measured principally by budget. Essential projects and programs will end up costing more than the original budget because the outcome is still required. This results in a high proportion of multi million dollar Government initiatives costing 2 or more times the original budget. Not only are there cost blow-outs but there are even worse things that happen. Scope gets cut to deliver on a deadline and/or budget. Quality is compromised for the same reasons. The Standish Group has documented this well in its Chaos Report and other work. The following is data from a 1986 report to the Australian Parliament and this aligns well with current observations.

StageBudgetImpactTiming
Shaping5%65%15%
Design10% 25%20%
Delivery85%10%65%
Source: Federal Parliamentary Review of Project Performance 1986

What is behind this very asymmetric pattern that flies in the face of conventional wisdom that efficient project delivery is what matters most?

Efficient delivery of a project is great. Providing that the project is delivering what is genuinely needed. A project delivers to its agreed scope and hands over its deliverables to someone else. That is how it is supposed to work. It is someone else’s problem to make sure that the scope and purpose are correct. That usually means a program that sets an overall vision and commissions work via a project. Program management is more about shaping a vision and making sure that the vision is achieved than it is delivering detail work. So how does it go wrong?

The best analogy is to think of a highly efficient project to get a bus load of people to Melbourne. Everything is well organised with no wasted time or effort and the bus is about to arrive when the message comes through “we just discovered that you all need to be in Sydney. Please hurry there.” This is where the costs build up, by having to change direction and rework to backtrack and start again.

The critical Design stage is often compromised by shortening it and even dropping it. The rationale? No time. We know what we need to do so get on with it. Design people are hard to manage so lets sideline them. Yet, Design stage settles critical matters that affect the outcome. Co-design brings those who know what probably should be done together to agree and refine their ideas so that there is ownership and better likelihood of successful later implementation. Design stage allows for broader consultation and communication that again draws out important information that would otherwise be discovered late (remember the bus to Melbourne).

Ready, Aim, Fire. That is a much more effective way than other orders of action. An ounce of prevention … etc. You will usually get to an outcome faster and more efficiently by making sure that you do your Shaping stage thoroughly (noting that proportionately, the time should be longer for Shaping and Design than the proportion of budget suggests. In the table, I suggest a metric for timing – once again looking at complex initiatives. A three year program therefore might take a year to properly plan out before delivering the resulting work.

However that misrepresents what Consulting Now! can achieve. The Shaping and Design stages can and should be undertaking small scale trials and proofs of concept to help decide which directions to take. My former colleague Evan Leybourn would even say that you have probably failed if you are running a project. Shifting form a project methodology to the agile approaches described here allows you to deliver value early, to learn quickly so that you head off wasted effort and make sure that those who are informed and interested get to contribute early.

Last comment. Think of how many Government Programs have been shut down after not achieving their outcomes after several years. They started with such promise and a huge launch outlining what great things would be achieved, yet ended unhappily. Not long after a new Program is started with refined objectives and purpose and this one achieves a degree of success, learning form past experience. Often this too is rebooted and third time’s a charm. The reason that it worked third time is that everyone learned from the previous work. Hard lessons that could have been learned in a less expensive way. And real outcomes that could have been delivered faster.

Really the last comment. A fringe benefit of doing all this hard work is that you get a free Agile Organisation. One that is able to respond to change quickly and decisively, consistently doing the right things the right way – because it becomes culture rather than the exception.

Well, hello there …

May you be condemned to live in interesting times.

It may be more than a year since I posted here. A long time and yet, it went by so fast. It has been an interesting year. I think I will celebrate the ending of 2018 with three articles. Plus maybe a dozen book reviews. Possibly an update or two in cricket umpiring, brewing and other personal things. Definitely a bit on work.

A quick catch up


“It doesn’t make sense to hire smart people and then tell them what to to , We hire smart people so they can tell us what to do. ”

Steve Jobs

The following is a little bit catharsis and a little bit still feeling bruised. I will not go into the messy details – for multiple reasons …

I was working as the Managing Partner with a longstanding management consultancy firm with responsibility for the Public Sector. 2017 was a very good year for us and a major project received an award for best change project of the year from a project management body. We had a small team in Canberra and a decent pipeline of work. However, at the end of February the owner of the business (based in the UK) called and told me that staff would not be paid the following day. I will not go into all the details but the key thing to note is that the liquidator sought funding from creditors to pursue the company directors for a significant amount of money.

For most of the staff, the Australian Fair Entitlement Guarantee helped out by paying most, if not all entitlements apart from redundancy. There were three employees that were not so lucky while still getting some of the lost pay and leave entitlements. Superannuation that was not paid was also lost. Overall a nasty business.

It would most likely have been possible to save the business and continue on with a restructure, had the UK directors approached it the right way. Work I was asked to do to find alternative investors was successful in finding them but the UK directors were not able to negotiate an arrangement due to time constraints and associated issues. Fair to say that March was a busy time for with nothing but additional travel bills to show for it.

One staff member in Canberra was able to start a piece of work we had just won after we were able to negotiate with the client to “novate” the contract. Half the other staff were able to find alternative work fairly quickly, however two had some difficulty. The way the company was just shutdown overnight  caused a lot of stress and anxiety to staff – that is an understatement.

Personally, I was in the fortunate position to choose between offers. I chose to join a company with which we had been doing work on a partnership basis for the past two years. It was the path of least resistance and the right one at a time when much was still uncertain. I worked with them from early April until the end of December. We had a number of goals in mind when I started and, while the revenue ones were exceeded, we were not able to win the larger pieces of work which would have allowed the achievement of growth and margin targets. As a consequence, I notified the board that I would be finishing up. I am now looking forward to a “new set of challenges”, I think the current orthodoxy demands.

I will go back to nearly a dozen articles that I started to write and left unfinished over the past year or so. I seem to have ideas and not enough time to finish writing them down.

Three articles

So what do I need to write about?

Working with Smart People. This is after seeing the remarkable reactions from several employers over the years.

What is Consulting Today? A general question that should be asked. The title is Consulting Now!

Startups, Business Agility, Design Thinking and Customers in the real world. This is a little of the trend(s) I have seen in the past decade.

… here goes