1. Dimitar Bakardzhiev Managing Partner Taller Technologies Bulgaria @dimiterbak Project Planning using Little’s Law

2. In Kanban a project is a batch of work items each representing independent customer value that must be delivered at or before a certain date

3. When planning a project You need to provide some idea as to when the project is going to be delivered. You need to provide a quote to the customer of how much the project will cost so she can decide whether to commit or not.

4. Little’s Law for production systems

5. Little’s Law applies to any system, and particularly, it applies to systems within systems

6. Little’s Law holds in case of a project 1. We must have conservation of Flow The average output or departure rate (TH) equals the average input or arrival rate (λ) There are no work items that get lost or never depart from the system 2. The system must occasionally empty, i.e., WIP = 0

7. Little’s Law can help us calculate the average Lead Time for a work item. But we need a relationship between the average Lead Time for a work item and the finite time period over which the project will be delivered!

8. A Kanban system is a queuing system!

9. How we measure Lead Time?

10. Visual kanban system

11. Average throughput of the project system equals the average throughput of the development system!

12. Proof using mathematical notation

13. Calculating Lead time for the project :

14. Number of developers we will need:

15. Examples

16. Calculating project delivery date

17. Budgeting a project

18. Calculated delivery time should be used only for the second leg of the Z- curve!

20. Z-curve

21. When calculating Project lead time we need to: Account for the other two legs of the Z-curve Account for Dark Matter Account for Failure load

22. Planned Project lead time is the sum of the calculated project length and a project buffer

23. The two essential measurements of project performance are the percentage of the project completed and the amount of the project buffer consumed.

24. Buffer consumption

25. Project Buffer length calculation

26. Percentage of the project completed

27. Project buffer consumption