Reversing the cycle requires project scheduling based on the Critical Chain. Here are the main concepts behind critical chain project scheduling
- Reduce number of projects assigned to each individual
- Schedule start of new projects based on availability of bottleneck resources
- Reduce amount of safety time added to individual tasks and then add some fraction back as project buffer. Buffers ensure that activities are completed on time.
- activity durations set so that there is a high probability the task will not be finished on time
The Critical Chain: this requires the recognition of the critical chain which is the
- Longest chain of consecutively dependent events and consider both precedence relationships and resource dependencies
- The implementation of a Project Buffer
- The implementation of Feeding Buffers
Click here to see a diagrammatic representation of the critical chain, project and feeding buffers project-buffer. In addition to the project and feeding buffers there are others as explained below.
- Project Buffers: after final project task
- Feeding Buffers: where non-critical activities lead into critical activities
- Resource Buffers: before resources scheduled to work on critical activities
- Strategic Resource Buffers: assure key resources available