After this chapter, you should be able to
- Define objective progress rules appropriate to construction scope and acceptance evidence.
- Distinguish installed, accepted, schedule, earned-value and payment progress.
- Establish a controlled status date and reconcile actual starts, finishes, quantities and remaining work.
- Calculate accepted progress variance, remaining quantity, remaining duration and a bounded forecast finish.
- Diagnose out-of-sequence progress and revise future logic without falsifying historical events.
- Separate variance, cause, consequence, forecast and management action in an update narrative.
- Preserve baseline, current update, data correction and change records as distinct controlled states.
The decision: what has actually been achieved at the reporting cut-off?Source §Progress measurement · Decision-led opening
Construction can appear active while accepted output remains behind plan. A reliable update begins with evidence at a declared cut-off, applies a progress rule set before the period, rebuilds the remaining forecast from current conditions and records the difference from the approved baseline.
Prerequisite checkSource §Learning sequence · Prior knowledge
A schedule update assumes a controlled baseline, complete logic, calendars, activity scope and defined completion evidence. Without that basis, percentage entries cannot explain whether the future network remains feasible.
| Record | Reviewer question |
|---|---|
| Approved baseline | Which dates and logic form the performance reference? |
| Previous accepted update | Which actuals and forecasts were already controlled? |
| Progress rules | How will each activity convert evidence into reported achievement? |
| Status date | Which cut-off separates history from remaining work? |
| Field and information evidence | Which accepted source supports every material status entry? |
Choose the reference
The latest forecast differs from the approved baseline. Which schedule should be overwritten during the update?
- The approved baseline
- Neither; preserve the baseline and issue the current forecast as a controlled update
- Every prior update
Reveal answer and feedback
Neither; preserve the baseline and issue the current forecast as a controlled updateThe baseline remains the performance reference unless authorised change creates a replacement. Each accepted update preserves the historical record.
Define progress before observing itSource §Progress measurement · Progress rules
A progress rule states which evidence earns which amount of reported achievement. The method should match the activity scope, produce comparable results between periods and prevent unsupported optimism. It is agreed before the reporting cut-off, not invented after seeing the outcome.
- Progress rule
- A pre-agreed method that converts verified achievement into reported progress.
- Installed quantity
- Physical work placed or produced, whether or not its required acceptance evidence is complete.
- Accepted quantity
- Work meeting the stated evidence and acceptance conditions for the selected progress measure.
- Actual start
- The recorded date on which the activity demonstrably began under the project rule.
- Actual finish
- The recorded date on which all scope and stated completion evidence satisfy the activity rule.
- Remaining duration
- The current forecast working time required to complete the activity scope left at the status date.
| Method | Appropriate use | Control question |
|---|---|---|
| Discrete completion | Short activity with one clear acceptance event | Is partial achievement meaningful and measurable? |
| Weighted milestones | Activity with defined internal deliverables | Do weights reflect scope rather than convenient dates? |
| Accepted quantity | Repeatable measurable production | Are units, sources and acceptance consistent? |
| Remaining-duration assessment | Forecast-focused update | Does duration reflect work left and current conditions? |
| Level of effort | Time-based support work | Is the activity truly driven by time rather than output? |
P_a is accepted progress, Q_a is accepted quantity at the cut-off and Q_t is the total controlled quantity. Use compatible units and a stable scope boundary.
- Define the scope and total controlled quantity before the period.
- State which evidence proves installation and which proves acceptance.
- Declare how rejected work, rework and provisional evidence are treated.
- Use the same cut-off and unit convention throughout the update.
- Record source, location, date, reviewer and acceptance state.
- Change the rule only through controlled governance with comparative impact.
Choose accepted progress
A package is 55 units installed, but only 48 units have passed the stated inspection rule. Which quantity supports accepted progress?
- 55 units
- 48 units
- The average of 55 and 48
Reveal answer and feedback
48 unitsInstalled work remains visible, but the accepted-progress measure follows the predefined inspection gate. Explain the seven-unit evidence gap separately.
Close and reconcile field evidenceSource §Progress evidence · Evidence closure
The control team closes evidence consistently at the status date. Useful sources can include accepted quantity records, inspections, approved deliverables, dated and located photographs, equipment logs, surveys and accountable supervisor records. Evidence strength depends on traceability and the stated rule, not on file volume.
| Evidence | What it can support | Limitation to record |
|---|---|---|
| Dated site photograph | Presence, location and visible condition | May not prove concealed work, quantity or acceptance |
| Measured quantity sheet | Installed or accepted quantity under its sign-off state | Cut-off, units and scope boundary must match |
| Inspection record | Acceptance condition and date | Outstanding defects or conditional status remain visible |
| Approved deliverable | Information or decision completion | Approval edition and downstream release must be traced |
| Supervisor record | Work occurrence, labour, plant and constraints | Independent corroboration may be required |
- Identify records that describe the same scope and cut-off.
- Compare quantities, dates, location, acceptance and source status.
- Investigate conflicts with the evidence owners before entering status.
- Retain provisional states explicitly rather than converting them into certainty.
- Record the accepted conclusion, rejected alternative and decision authority.
Report physically complete work awaiting acceptance
At noon on the status date, a slab is physically complete, but its specified inspection record is not approved. The activity rule requires accepted inspection for full completion.
- Observed fact
Physical work appears complete at the cut-off
Installed state is recorded with dated evidence - Rule
Full progress requires the accepted inspection record
Actual finish is not yet entered - Schedule consequence
Successor release remains conditional on acceptance
Future logic and access are reviewed - Action
Name inspection owner, target response and next evidence check
The forecast response is accountable
Result. Record physical installation and the missing acceptance separately. Do not silently weaken the completion rule to retain the planned date.
Resolve conflicting records
A photograph suggests completion, while the signed quantity sheet records less accepted work. What is the first response?
- Use the larger value
- Reconcile scope, location, cut-off and acceptance with the evidence owners
- Average both values
Reveal answer and feedback
Reconcile scope, location, cut-off and acceptance with the evidence ownersDifferent records may measure different states. Resolve their basis before applying the progress rule.
Run the update around one controlled status dateSource §Schedule updating · Update cycle
The status date separates actual history from remaining forecast work. The team closes evidence, records actual starts and finishes, measures quantities and work left, reassesses remaining durations, reviews future logic and calendars, recalculates paths and issues a controlled narrative. The order protects the forecast from optimistic date-first editing.
- Confirm the current file, previous update, baseline reference and status date.
- Close field, design, procurement, inspection and decision evidence at one cut-off.
- Enter accepted actual starts, actual finishes and progress under defined rules.
- Reconcile installed, accepted and remaining quantities.
- Forecast remaining durations from current production conditions.
- Review out-of-sequence work, future logic, calendars, constraints and risks.
- Recalculate critical and near-critical paths, float and milestones.
- Explain variance, cause, forecast consequence, action, owner and review trigger.
- Assure, approve and archive the controlled update and narrative.
D_r is whole working-day remaining duration, Q_t is total quantity, Q_a is accepted quantity and R_r is current expected accepted output per working day. Apply the correct calendar after retaining the raw calculation.
Rebuild the work-package forecast at the cut-off
A package totals one hundred units. Sixty accepted units were planned by status day ten, fifty-five are installed, forty-eight are accepted and the current accepted-output rate is eight units per working day.
- Accepted progress
48 / 100 × 100 = 48%
Accepted progress is forty-eight percent - Accepted variance
48 − 60 = −12
The package is twelve units behind the accepted-quantity plan - Evidence gap
55 − 48 = 7
Seven installed units remain unaccepted - Remaining quantity
100 − 48 = 52
Fifty-two accepted units remain - Remaining duration
ceil(52 / 8) = 7
Seven working days remain - Simple forecast finish
status day 10 + 7 = day 17
Day seventeen under the declared teaching convention
Result. The update preserves the twelve-unit variance and rebuilds the remaining forecast from accepted work and current production evidence.
Forecast the remaining duration
Fifty-two accepted units remain and current accepted output is eight units per working day. What whole-day duration should be carried before calendar placement?
- Six days
- Seven days
- Eight days
Reveal answer and feedback
Seven daysFifty-two divided by eight is six and a half. The bounded teaching rule rounds up to seven whole working days.
Resolve out-of-sequence progress from physical truthSource §Schedule updating · Out-of-sequence progress
Out-of-sequence progress occurs when observed work advances contrary to the current predecessor logic. The event may expose invalid logic, unsafe or unauthorised work, a partial hand-off, or an actual method change. Software can calculate different treatments, but the team must first establish what physically happened and what condition remains.
| Question | Possible evidence | Schedule response |
|---|---|---|
| Did the successor physically start? | Dated location record and responsible confirmation | Correct erroneous status or retain the actual event |
| Which predecessor condition remains? | Inspection, access, information or quantity record | Keep visible remaining work and restriction |
| Was the original relationship valid? | Method and interface basis | Retain or revise future logic prospectively |
| Is continued work authorised and feasible? | Safety, quality, access and governance decision | Pause, constrain or continue under recorded conditions |
| What changes downstream? | Successor sequence, rework and risk review | Recalculate dates, paths and forecast narrative |
Treat a verified early successor start
Successor work genuinely began before the predecessor acceptance condition. What should happen first?
- Let the software choose a treatment automatically
- Confirm the physical event, remaining condition and authorised future logic
- Delete the predecessor
Reveal answer and feedback
Confirm the physical event, remaining condition and authorised future logicThe calculation follows the verified production reality and management decision, not the reverse.
Separate variance, cause and forecast actionSource §Variance and forecast · Interpretation sequence
Variance is a difference from a reference. It does not identify cause. A useful update connects milestone movement, float erosion, quantity and productivity trends, path changes, constraints and evidence confidence to a future consequence and accountable response.
| Element | Required statement |
|---|---|
| Observed fact | Accepted quantity, actual event, source and cut-off |
| Variance | Difference from baseline or prior forecast under the same convention |
| Likely cause | Evidence-supported driver with stated confidence |
| Schedule consequence | Remaining duration, path, float and milestone effect |
| Action | Feasible response, owner, authority and due date |
| Trigger | Evidence or next cut-off that will test the response |
Write a defensible update
Which statement separates fact, consequence and action?
- The activity is late
- Forty-eight accepted units are recorded against sixty planned; seven working days remain at the current rate; the package lead will close the inspection gap before the next cut-off
- The team will try harder
Reveal answer and feedback
Forty-eight accepted units are recorded against sixty planned; seven working days remain at the current rate; the package lead will close the inspection gap before the next cut-offThe statement identifies evidence, variance, forecast and accountable response rather than relying on a label.
Explore a reporting cut-offSource §Interactive learning · Simulation sequence
The explorer uses a one-hundred-unit work package. Predict the accepted-progress position, vary planned, installed and accepted quantities, update the current production rate, test an out-of-sequence condition and compare the rebuilt forecast with the base status date.
Progress Update and Status-Date Explorer
Test how accepted evidence, remaining production and logic conditions alter progress variance, remaining duration and a bounded current forecast.
- Learning sequence
- Review the base cut-off · Record a progress-position prediction · Change one quantity or evidence condition · Compare installed and accepted progress · Resolve the out-of-sequence state · Load the reconciled update · Write a three-line update narrative
- Assumptions
- One work package · One-hundred-unit base quantity · Accepted-quantity progress rule · Whole working-day remaining duration · Simple finish equals status day plus remaining duration · One predecessor acceptance condition · No payment, cost or probabilistic effects
- States
- Base cut-off · Changed evidence · Behind · On plan · Ahead · Out of sequence · Forecast ready · Prediction checked · Invalid input · Reset
- Validation
- Implemented against deterministic teaching cases; independent technical approval pending
Reconcile evidence at the status date and rebuild the remaining forecast
Predict first. Compare planned, installed and accepted quantities, then resolve remaining work and out-of-sequence logic.
Where will accepted progress sit against the plan?
Base reporting cut-off loaded. Predict the accepted-progress position before checking.
Successor work is reported before the predecessor acceptance condition is satisfied.
Do not let a software setting decide the physical truth. Identify what work occurred, which predecessor condition remains, how the successor can continue safely, and which future relationship must be revised prospectively.
| Measure | Quantity | Percent | Interpretation |
|---|---|---|---|
| Planned by status | 60 | 60.0% | Accepted work expected by the cut-off |
| Installed | 55 | 55.0% | Physical work requiring stated acceptance treatment |
| Accepted | 48 | 48.0% | Progress reported under the teaching rule |
| Remaining | 52 | 52.0% | 7 working days at the current rate |
Reflect before continuing
Which source proves the accepted quantity, which installed work remains unaccepted, and what must change in future logic after out-of-sequence work? Separate the observed fact, schedule consequence and accountable next action.
Issue and preserve the controlled updateSource §Management interpretation · Controlled issue
| Record | Required statement |
|---|---|
| Identity | Schedule, revision, data date, baseline reference and previous update |
| Evidence | Actuals, quantities, source, cut-off and acceptance state |
| Forecast | Remaining quantities, durations, logic, calendars, constraints and paths |
| Variance | Baseline and prior-forecast differences under consistent rules |
| Narrative | Cause evidence, consequence, action, owner and trigger |
| Governance | Assurance, approval, issue date, recipients and archived source |
The update meeting is an evidence and decision process involving field, design, procurement, commercial and planning owners. The planner maintains the model, but progress acceptance and future method decisions remain with the accountable people identified by project governance.
Preserve the reporting record
A prior accepted update contains a genuine quantity error. What is the controlled response?
- Delete the prior file
- Correct the current record with evidence, authority and an explicit audit trail
- Ignore the error forever
Reveal answer and feedback
Correct the current record with evidence, authority and an explicit audit trailTransparency preserves historical integrity while allowing the current schedule to use corrected evidence.
Lesson synthesisSource §Learning sequence · Synthesis
Key points
- Progress rules are established before the period and connect evidence to reported achievement.
- Installed, accepted, schedule, earned-value and payment progress remain distinct until reconciled.
- One controlled status date separates accepted history from remaining forecast work.
- Remaining duration reflects work left and current production evidence, not the desired finish.
- Out-of-sequence work is resolved from physical truth and authorised future logic.
- Variance does not explain cause; the narrative connects evidence, consequence, action and trigger.
- Baseline, current update, error correction and authorised change retain separate records.
Source references recorded by the supplied chapter
- Chartered Institute of Building — Accreditation and Education Framework.
- Royal Institution of Chartered Surveyors — Project Management sector pathway.
- Deakin University — Construction Management curriculum overview.
- Colorado State University — Construction Management undergraduate course descriptions and learning outcomes.
- All India Council for Technical Education — Model Curriculum for Undergraduate Degree in Civil Engineering.
- United States Government Accountability Office — Schedule Assessment Guide.