critical chain project management edina nagy lajos kiss szabolcs hornyák
TRANSCRIPT
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…