Evaluate Plan Deviations

Not every deviation requires replanning. The decisive question is whether the deviation changes the project finish date, resource situation, costs, or the decision basis for the portfolio.

Do not evaluate deviations in isolation. A schedule deviation can be caused by missing capacity. A cost deviation can follow from higher effort. A resource deviation can endanger the finish date even when the individual task still looks non-critical.

Classify the Deviation

Check every major deviation in this order:

Variance analysis table with deviations
  1. Location of the deviation

    Does it affect one task, a subproject, one project, or several projects?

  2. Type of deviation

    Is it about dates, effort, costs, role demand, employee assignment, material, or machines?

  3. Impact

    Does the critical path move, does effort increase, do costs rise, or are resources overloaded?

  4. Cause

    Is the cause wrong planning, changed requirements, missing availability, execution feedback, or resource overload?

  5. Decision need

    Can the project manager act directly, is resource clarification required, or must PMO or management decide?

Use Warnings and Project Information

Rillsoft Project shows conflicts and critical states in project information. Use these warnings as the entry point for root-cause analysis.

Late activities in project information

Important warnings are:

  • Late activities: tasks should have progressed further by the reporting date.

  • Overallocated resources: employees or other resources are planned beyond their available capacity.

  • Failed resources: non-working days or absences prevent planned work.

  • Unassigned resources: planned role effort is not yet covered by named employees.

  • Partially assigned resources: demand is only partly covered by available resources.

  • Project overview and portfolio overview: condensed view of project and portfolio state.

When Replanning Is Needed

Replanning is useful when:

  • the critical path is affected

  • the project finish date is no longer reachable

  • effort or costs are permanently higher than planned

  • resource bottlenecks cannot be solved by simple reassignment

  • several tasks have the same cause

  • an approved scope or schedule change exists

No replanning is needed when:

  • the deviation is small and remains within available buffer

  • the cause has already been resolved

  • the task is not critical and no successor dates are endangered

  • only a feedback entry was entered late

Check Resources as a Cause

Because Rillsoft Project evaluates dates and resources together, always check the resource situation when schedule deviations occur.

Time deviation in target actual comparison

Check:

  • Is the required role demand fully covered by employees?

  • Are there overloads in the relevant period?

  • Are non-working days, vacation, or illness entered?

  • Are suitable employees available with the required professional qualifications?

  • Do other projects compete for the same capacity?

If resources are the cause, switch to capacity balancing before moving dates manually.

Prepare the Decision

Formulate the control decision concretely:

Situation

Possible decision

Task is late but still has buffer

Monitor and check progress again at the next reporting date.

Critical task is late

Clarify cause, check schedule and resources.

Effort increases

Reevaluate remaining effort, capacity, and costs.

Employee is overloaded

Perform capacity balancing and check assignment.

Costs increase

Check cost cause and financing.

Plan change is approved

Update the project and save a new baseline if required.

Typical Mistakes

  • Deviations are evaluated only by color, not by cause.

  • Dates are corrected manually without checking dependencies and resources.

  • A new baseline is saved before the deviation is professionally approved.

  • Resource overloads are treated as a schedule problem.

  • Status reports list deviations but no decision or next action.