critical chain project management

edina nagylajos kiss

szabolcs hornyák

•critical chain project management

•dr. Eliyahu M. Goldratt

•CCPM (1997)

CCPM

CCPM

two important facts:

• the duration of activity is variable, therefore cannot be 100% reliability and accuracy of estimate

• the organization's resources are limited - there are logical and resource relations between the project's activities

is an important idea in developing critical-chain project plans.

the procedure to develop the critical-chain plan ensures that the plan you build will be good enough.

good enough

the statistical rule says that the uncertainty of the sum of the events is much less than the sum of the uncertainty for each event.

you should consider Goldratt’s recommendation in context with his recommendation to reduce activity times in half.

statistical background

two strengths: • it is simple• provides a large enough buffer

weakness:• it doesn’t allow you to explicity

account for known variation in the tasks.

project and feeding buffer size

normal early-start schedule

2.1

late-finish schedule

with no resource contention, just add buffers

with resources

alternative ways to resolve resource conflict

two alternatives with buffers

critical chain project management

second edition lawrence p. leach

pp. 127-138

http://en.wikipedia.org/wiki/Critical_Chain_Project_Management

references

thanks…