The Laws and the rules
“The average number of work items in a stable system is equal to their average completion rate, multiplied by their average time in the system.” ~ John Little, 1961
“A Proof for the Queuing Formula” by Little, J. D. C. (1961)
Also, let’s remember the rule of three (wikipedia):
The rule of three is a writing principle that suggests that events or characters introduced in threes are more humorous, satisfying, or effective in execution of the story and engaging the reader. The reader or audience of this form of text is also thereby more likely to remember the information conveyed. This is because having three entities combines both brevity and rhythm with having the smallest amount of information to create a pattern. It makes the author or speaker appear knowledgeable while being both simple and catchy.
Studying the CFD, or cumulative flow diagram. It is a great visualization tool for teams managing flow using a Kanban system.
Exercise your agility (v0.1)
- What is the throughput on Week 6?
- What is the lead time (the average time in process)?
- What is the cycle time?
- What is the WIP on week 9?
It is important to understand the difference between lead time and cycle time. They are different. I’m not a fan of reinventing the wheel, so check out this article from Stefan Roock. Work through the presentation below to get your answers.