| ISSUES | |||||
| Area | CCPM | EVMS | Description | Team | Resolution |
| Time buffers | hold at appropriate level to protect critical chain | each task could hold schedule reserve at lowest level | What is appropriate placement of schedule reserve? | ||
| Cost buffers | ? | management reserve held at total program level | Should budget reserves be established for time buffers? What should the value be? | ||
| Buffers | Do buffers have a single WBS or OBS element? What are the alternatives for reporting consumption of buffers? How do we report BCWP against a buffer? | ||||
| Schedule probabilities | schedule tasks at 50% probability | ? | What is the normal practice for schedules used to support EVMS? 90% as some suggest? | ||
| Integrated Baseline Reviews | review of schedule, budget realism | IBRs typically only look at resources directly supporting the contract. Should we look at company level resources that could be a constraint and therefore a risk? | |||
| BCWS | Currently use early finish for BCWS | Use late start? What should we use for BCWS? Does this drive trying to earn budget (BCWP) earlier to state more progress? | |||
| Metrics/Reporting | focus on global (project completion) | focus on local optima (task completion) | Does focusing on optimizing tasks put the entire project in jeopardy? Is this a valid concern? | ||
| Metrics/Reporting | Current EVMS policy of addressing variance thresholds for each task would multiply the number of variance explanations required for CCPM, given 50% probability | ||||
| Metrics/Reporting | collection of "critical few" metrics | "collection of many trivial" metrics | What is the correct emphasis for metrics? Do different stakeholders require different metrics? | ||
| Metrics/Reporting | % of buffer consumed | Cost and schedule variances | What is appropriate early warning that problems are developing? | ||
| Government policy | ANSI/EIA-748-1998 | Is there any conflict between the ANSI standard (I.e., 32 criteria) for EVMS and CCPM? | |||
| Time Durations | estimated time for task is variable | discrete times for each task | What do we baseline to? | ||
| Customers | How should we change the focus of our customers to accept CCPM? |