How to Monitor Project Cost and Schedule

Root-cause analysis identifies why performance changed. However, analysis alone cannot recover project performance. The next step is to convert verified causes into targeted corrective action.

Effective corrective action should address the actual cause, protect critical objectives, assign clear ownership, and produce measurable improvement. It should also consider both cost and schedule consequences.

Define the required outcome

Start by defining what the project needs to improve. Avoid creating actions simply because a variance appears in the monthly report.

For example, the required outcome may involve recovering a milestone, improving labour productivity, reducing material waste, resolving a procurement constraint, or controlling forecast cost growth.

State the outcome in measurable terms wherever possible. A clear outcome gives the corrective action a specific purpose.

Match the action to the root cause

The corrective action should address the cause identified during Step 5. Otherwise, the project may treat the symptom without changing the underlying condition.

For example, adding overtime may temporarily increase output. However, overtime will not solve a recurring design-release problem that prevents crews from accessing planned work.

Similarly, increasing resources may not improve productivity when poor sequencing creates repeated work interruptions.

Therefore, challenge whether the proposed action can actually influence the identified cause.

Prioritize critical problems

Not every variance deserves the same level of intervention. Prioritize actions according to their potential effect on project objectives.

Consider:

• Cost impact: Could the issue materially increase final project cost?
• Schedule impact: Could it affect critical milestones or completion?
• Criticality: Does the issue affect critical or near-critical work?
• Recurrence: Does the problem continue across reporting periods?
• Exposure: Could the condition create additional future risks?

This prioritization helps management focus limited resources on actions that can materially improve the project position.

Choose the right type of intervention

Corrective action can take different forms. The appropriate response depends on the cause, urgency, authority, and remaining project conditions.

Possible interventions include:

• Resequencing activities to remove execution bottlenecks.
• Reallocating resources to critical work.
• Improving productivity through revised methods.
• Expediting critical procurement.
• Resolving design or approval constraints.
• Reducing rework through quality interventions.
• Negotiating supplier or subcontractor recovery measures.
• Revising execution strategies when existing methods no longer remain practical.

However, do not select an action simply because it produces a rapid visible response. Consider its cost, feasibility, risks, and effect on other project activities.

Protect the critical path

Schedule corrective action should consider network logic rather than focus only on delayed activities. A delayed activity may have available float, while another activity may threaten the project completion date.

Review critical path, near-critical activities, float, predecessor relationships, resource constraints, and milestone dependencies before changing the execution plan.

For example, accelerating one activity may create congestion or increase costs without improving the final completion date.

Therefore, evaluate the entire schedule response before committing resources.

Evaluate cost before approving recovery

Schedule recovery can increase project cost. Overtime, additional shifts, extra equipment, expedited procurement, and additional supervision can all create financial consequences.

Therefore, compare the cost of recovery with the value of the schedule benefit.

For example, accelerating a critical activity may protect a contractual milestone. However, management should understand the additional cost and confirm that the expected benefit justifies the expenditure.

This prevents schedule recovery from creating an uncontrolled cost problem.

Assign clear ownership

Every significant corrective action should have one accountable owner. A group name alone does not create accountability.

Define:

• Action: What exactly must happen?
• Owner: Who remains accountable?
• Due date: When should the action produce results?
• Measure: How will the team confirm improvement?
• Escalation: What happens if the action fails?

This structure turns corrective action into a controlled management process rather than an informal commitment.

Build actions into the project plan

Important recovery actions should appear in the appropriate project-control mechanisms. Do not track critical actions only through meeting minutes or email exchanges.

Where appropriate, incorporate actions into the schedule, action register, risk register, change process, procurement plan, or recovery plan.

This creates visibility and allows the team to track whether the action progresses as planned.

A corrective action should become part of project execution, not remain outside it.

Measure whether the action works

Do not close a corrective action simply because someone completed the assigned task. Confirm whether the action actually improved project performance.

For example, a contractor may add resources to a work package. The project team should then check whether productivity improved and whether the schedule actually recovered.

Useful measures may include:

• Improved productivity.
• Reduced variance.
• Improved float position.
• Recovered milestone dates.
• Reduced forecast exposure.
• Improved cost efficiency.

This distinction separates action completion from performance improvement.

Monitor unintended consequences

A corrective action can solve one problem while creating another. Therefore, review its wider impact after implementation.

For example, additional overtime may recover schedule performance but increase labour costs and fatigue-related productivity or safety risks.

Similarly, resequencing work may protect one milestone while creating congestion for another discipline.

Consequently, evaluate corrective actions across cost, schedule, resources, quality, risk, and operational constraints.

Escalate when recovery fails

Not every corrective action will produce the expected result. When performance continues to deteriorate, management needs to know quickly.

Define escalation triggers before implementing major actions. These triggers may include continued milestone slippage, worsening productivity, additional forecast growth, or failure to remove a critical constraint.

Early escalation gives management more options. Delayed escalation can reduce the remaining recovery opportunities and increase the eventual cost of intervention.

Update the performance outlook

After implementing corrective action, update the project outlook using the latest evidence. Do not assume that the original forecast remains valid.

Assess whether the action changes remaining productivity, duration, resource requirements, procurement conditions, or other assumptions.

Then determine whether the expected completion date and final cost require adjustment.

This creates a direct connection between performance analysis, corrective action, and forecasting.

Once corrective actions are implemented and their effects become measurable, the project gains better information about its future position.

This naturally leads to Step 7: Forecast, Learn and Improve. The final step uses the latest performance evidence to refine the project outlook, measure forecasting accuracy, capture lessons, and strengthen the monitoring process for the remaining delivery period.