MNT.7:5 - Archetypal Grounding
The following is the whole-outage calculation for the constructed PS17 application. It is a reasoning example, not an equipment procedure or a time standard. The qualified operating result allows four hours, or 240 minutes, of the stated reduced-capacity operation.
| Selected activity | Elapsed minutes inside the outage | Basis in this constructed plan |
|---|---|---|
| Controlled shutdown and establishment of isolation | 30 | The applicable protected-access work is included. |
| Selected bearing intervention | 95 | Parts, tools and provider are ready before shutdown. |
| Controlled testing and functioning verification | 45 | Includes the necessary test-state transitions. |
| Final restoration and return of control | 25 | Includes the receiving operator’s hand-back work. |
| Explicit contingency | 30 | This is additional to the task estimates, which exclude it. |
| Whole planned demand | 225 | Sequential demands; no unsupported overlap is assumed. |
Ninety minutes of preparatory work occurs before the outage and is excluded from its demand. The plan leaves 15 minutes beyond the explicit contingency within the 240-minute operating bound. That arithmetic establishes fit only for the constructed estimates and supported conditions.
If an additional 20-minute demand arises beyond all included allowances, the demand becomes 245 minutes and no longer fits. The team revisits the operating or intervention arrangement. It does not consume testing or hand-back time to preserve the appearance of a four-hour plan.
If the spare applicability return is absent before the planned start, the team does not begin this replacement branch. If the actual isolation cannot be established, the affected protected work does not start. Those limits preserve the earlier completed recommendation and return a different coordination question.