Flow, Cadence, Slack, and Stress: Lean Muppets Post 7

Scooter Reduces Cycle Time to Rowlf’s Breaking Point

Here we find Rowlf singing Coleman and Fields’ “It’s Not Where You Start, It’s Where You Finish.” He sings at a comfortable rate and all is well. Scooter then tells him he needs to do it again, but this time a little faster. So Rowlf turns on the juice, hits more of a ragtime vibe, and blasts through the song, completing with a bit of stress, but still can add a flourish or two on the piano. Scooter then pokes his head in and tells him to do it again in 20 seconds. Rowlf then shifts into high gear, his ears flapping, his head bouncing, and words coming out fast enough to rival hardcore 80s punk. At the end of the third, he's done his work in such a short amount of time, he must close the piano all together and simply concentrate on breathing.In our work, we have lean concepts of flow, cadence, and slack. In our book, Personal Kanban, we describe them like this:

• Flow: The natural progress of work

• Cadence: The predictable and regular elements of work

• Slack: The gaps between work that make flow possible and define cadence

Flow is a little deeper than this, because the concept of “flow” differs slightly for psychologists or lean practitioners. Both concepts, however, are important for knowledge workers and managers.For psychologists, “flow” is a state of mind where we feel in the zone. This is where everything is moving at the right pace, we have clarity and comfort with our actions, and we have a sense of peace with the process under which we are working.In lean, “flow” is more the rate at which work progresses. You have a value stream and work flows along it. Flow is hindered by bottlenecks, constraints, policies, or other ne’er-do-wells.Cadence helps us set flow. It’s like the beat. It’s the rhythm of our work. The right cadence can move tasks from start to completion at just the right rate to maximize completion and quality.Slack is sort of the space between beats. You can’t have a drum solo without silence.All three of these work together to create a natural system of work not unlike music. So we see it in Rowlf.The first round of the song he is fine, even the request for a faster variation is welcome. He can complete his task and is ready for more.The second round of the song, he makes little jokes like, “how’m I doing?!” He’s going faster than he’s comfortable with, his pace is not sustainable, but he can still complete the work. (This unsustainable fast pace is where many companies try to keep their knowledge workers).The third round is where some misguided managers like to live every day. Rowlf is asked to do the song at the very limits of his capability: in 30 seconds. Scooter, the project manager, isn’t even listening to the song, he’s just counting the seconds to on-time completion. Rowlf does bring the project in on-time but, again, he completely collapses after it is done.Between the first and third rounds, Rowlf endures a great deal of stress. When flow, cadence, and slack are in agreement, product delivery is flawless and nearly effortless. The more they are not in agreement, the more effort is needed and the more stressful the work is.At his initial pace, Rowlf could probably play all day, every day. At the second pace, maybe he could play for an hour. At the third however, he'd barely make it through one playing.And as we can see below, even adrenaline junkies like Animal are not immune.

Maybe Buddy Rich is Immune

This is the seventh in a series of Lean Muppet Posts: For a list of Lean Muppet posts and an explanation of why we did this... look here -> Lean Muppets Introduction

Slack: Why Limit WIP Series, Post 3

Bob_slack02

Slack.The word conjures up images of slothfulness, of days spent lazying about in a seaside hammock beneath the fronds of a blowing palm tree.But relaxation is not necessarily sloth. Just because someone or something appears to not be fully utilized is not an indication of their disutility.Consider the belts in your car’s engine. In order to operate effectively, they can’t be too tense, they must have some give. Engine optimization relies on belts having the appropriate amount of slack.It’s the same with our work. We need slack for our own optimization. In our work, we’d like to have a degree of slack to:

1. Make sure we are able to focus on the tasks at hand;

2. Make sure we have the capacity to deal with unforeseen events;

3. Make sure we can stop periodically to allow our brains to perform vital functions in memory, processing, and regeneration; and especially to

4. Make sure we don’t work ourselves into an early grave.

When we have unlimited WIP, we tend to start multiple tasks concurrently, and then run in circles trying to complete them. As we’ve discussed in our previous posts in this series, overwork creates additional work, heightens stress, and results in a poor quality product.

Focus on Tasks at Hand

Slack allows us to focus on the tasks at hand simply by giving us the ability to work in a non-freaked, sans-OMFG state. In the absence of slack, we aren’t only working on our current task, we’re fretting because we know there are countless other tasks we’ve started and that they demand completion. We live with an underlying fear that something, somewhere will break and when it does, it’ll be unlikely we’ll be able to deal with it.Slack is, in the end, a recognition that our time, our brainpower and our emotional fortitude are all limited. If we tax all these resources, we will not be able to do the work on our plate or deal with unforeseen events.

Unforeseen Events

When we’re overloaded with work, we invite panic. We invite emergencies. When we have zero capacity for new work, additional work exacerbates our overload. The thing is, unforeseen events are inevitable; they happen all the time. We can’t predict the future, we can only give ourselves the slack to deal with whatever may come our way - good or otherwise.If we have three tasks in process and something unexpected comes along, we - at worst - have four tasks in flight. This is still a substantial number less than most people currently have.  This doesn’t make the unforeseen event a welcome one, but it does make it a manageable one.

Rest, Processing, and Catch-up

Francesco Cirillo’s simple yet profoundly powerful Pomodoro Technique invites us to use a timer set to 25 minutes during which we focus without distraction. The timer’s ring alerts us to rest. The ratio suggested is 25 minutes of work to 5 minutes of rest - and then repeat (taking an even longer break after 4 successive pomodori). This isn’t merely to let us have a “coffee break.” Our brains need recharge points.The brain is not some easy going organ...it’s a resource hog.When we’re working intently on something, our brain burns a lot of calories, uses a lot of water, and gets tired. Allowing periodic points of slack allows us to hydrate, grab a snack, and recharge.Not only this, but the brain also works in three memory modes: short term, mid term, and long term. Having slack and taking breaks allows the brain to pause and write vital information from short to mid term memory. The more we overload ourselves with work, the more we forget.

Stayin’ Alive

As we can see, without incorporating slack into our work day, we end up taking on too much work, too much stress, and with too little down time. These factors decrease happiness and longevity. That’s not a good thing.We limit our WIP specifically to achieve a comprehensible workload that allows us to complete, understand the costs of our choices, make better decisions, and react elegantly to life’s surprises.

What If I Had A Slack Card?

Showing Slack Card

“All things in moderation, including moderation.”― Mark TwainIn yesterday’s post, you may have noticed that we have a “Slack Card” in our Personal Kanban for the day.The problem we, like most people, were having was this:Productivity feels good.The Zone feels good.But productivity and the zone can lead to burnout.Just like Pomodoro includes rests every 25 minutes, we wanted to include a Pomodoro that was nothing but slack.What we assumed was that we have eight half hour pomodoros in an eight hour work day.Interruptions, non-focused tasks, and other minutia tend to make pomodoros not start back-to-back.Of those eight, the slack card is kind of a “get out of jail free” card. It can let you spend a free half hour just resting, it can be spent collaborating on less focused tasks, it can be used to “throw away” if interruptions stop you from being able to do one of your Pomodoro.  Ultimately it’s a visual place holder for an option. You be the judge.