Impacts of Month Locking

Actuals & Financial Data

All actual hours, costs, and revenue for locked periods become read-only, including:
- Actual hours and costs
- Actual revenue used in margin calculations
- All financial metrics (Revenue, Cost, Margin, Forecast vs. Actual)

Important: Once locked, timesheet edits or rate changes cannot alter the financial impact of past periods.

Non-Labor Resources

When you lock a month, non-labor budget data for past periods is overwritten with actuals:
- Budget Cost = BAC (Budget at Completion)
- Expected Revenue = RAC (Revenue at Completion)

After locking, these values become **fixed snapshots** and won't be re-planned automatically.

> 💡 **Best Practice:** Update future non-labor plans **before** locking the month.

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### Assignments & Tasks
- **Past assignments** become read-only—you cannot modify them for dates in locked periods
- **Task start dates** before the locked month become manually set
- **New tasks** must start on or after the Current Fiscal Month
- Tasks without an explicit start date default to the **first workday of the open month**

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### Timesheets
Approved timesheets in locked periods are **permanently frozen** (unless you reopen the month):
- Their financial impact (cost, revenue, margins) cannot change
- Depending on your mode:
  - **Reported Date mode:** Cannot approve timesheets dated in locked periods
  - **Approval Date mode:** Cannot approve timesheets while the month is locked

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## ✅ What You Can Still Change

Good news! Locking a month **doesn't freeze everything**:

### Future Periods Remain Flexible
- **Forecasts & ETC** for open months can still be updated
- **Labor Budget Cost/Revenue** may be recalculated for periods after the lock
- **Non-labor forecasts** for future months can still be adjusted
- The **Update Forecast** process can replan open months (starting from the first unlocked month)

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## 📊 After Running Update Forecast

If Update Forecast performs re-planning:
- Labor Budget Cost/Revenue is recalculated for all periods **after** the locked month
- Updated values appear in Financial Planning after a **manual Refresh** or the **scheduled nightly refresh**

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## 🎯 Key Takeaways

✔️ **Locked periods = read-only financials**—actuals, budgets, and margins are frozen  
✔️ **Future periods stay flexible**—you can still forecast and plan ahead  
✔️ **Plan before you lock**—update non-labor forecasts for future months before locking  
✔️ **Timesheet financials are final**—approved timesheets in locked periods cannot change the numbers  

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**Questions?** Contact your system administrator or check our Financial Planning documentation for more details.