The University of Sydney · FACULTY OF PROJECT MANAGEMENT

PMGT5889 Chap.10 Forecasting Estimate at Completion

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Chapter 10 of 12 · PMGT5889

Forecasting Estimate at Completion

Define estimate at completion

Forecasting Estimate at Completion frames a decision through estimate at completion, estimate to complete and to-complete performance index.

The objective is to select a forecast formula by stating whether current efficiency is expected to persist, so the chapter should be read as a chain from problem definition to evidence, option comparison and accountable action.

Start with estimate at completion and name the decision owner, affected stakeholders and time horizon.

The same estimate at completion fact can matter differently across those positions, so the opening frame determines which evidence is relevant.

Use estimate to complete to explain how the present condition produces an opportunity, cost or risk.

A strong estimate to complete mechanism states what changes, for whom and through which organisational, market or institutional process.

Apply to-complete performance index when comparing options. Keep the to-complete performance index criteria distinct, test trade-offs and ask which assumption drives the recommendation.

A score or matrix helps only when its criteria are justified by the case.

For the application — select a forecast formula by stating whether current efficiency is expected to persist — finish with an actor, action, rationale and review trigger. This turns the to-complete performance index analysis into a recommendation while keeping the decision open to new evidence.

Build a decision ledger.

Separate the current condition, the stakeholder affected, the evidence supporting estimate at completion, the mechanism represented by estimate to complete and the criterion supplied by to-complete performance index.

If a to-complete performance index recommendation cannot point back to one of those entries, it is probably preference dressed as analysis rather than a consequence of the case.

Compare at least two feasible options against the same criteria. State who benefits under to-complete performance index, who bears cost or risk, what capability implementation requires and what evidence would reveal failure.

This comparison is essential when students need to select a forecast formula by stating whether current efficiency is expected to persist, because an attractive option is not defensible until its trade-offs are visible.

Rehearse the PMGT5889 estimate at completion response as a short briefing: one sentence for the decision, two for the evidence and mechanism, one for the alternative and one for the qualified recommendation.

Then expand only the estimate to complete move that needs more support. This protects the argument structure under a strict word or time limit.

A complete response should make the task visible before the detail: identify what must be decided, define the relevant terms, connect the evidence to estimate to complete, and use to-complete performance index to test the result.

The final sentence about to-complete performance index should answer the question actually asked rather than merely repeat the topic.

The controlling limit is specific: A formula is not a forecast justification unless its future-performance assumption matches the project evidence.

Keep that to-complete performance index limit beside the worked example, because it separates a careful PMGT5889 answer from one that sounds confident but claims more than the task or evidence supports.

For revision, retrieve estimate at completion, estimate to complete and to-complete performance index without notes, explain their relationship aloud, then complete a changed version of the application: select a forecast formula by stating whether current efficiency is expected to persist.

Record the first failed estimate to complete reasoning move and repair it before attempting another case.

In this chapter

What this chapter covers

  • 01

    estimate at completion

  • 02

    estimate to complete

  • 03

    to-complete performance index

  • 04

    Applying estimate at completion

  • 05

    Limits of estimate to complete and to-complete performance index

Worked example · free

AskSia practice: apply Forecasting Estimate at Completion

Q [4 marks]. AskSia-authored four-point reasoning drill: how should a student select a forecast formula by stating whether current efficiency is expected to persist? This is not a University question or marking scheme.
  • 1Define estimate at completion in the scenario.
  • 1Explain the mechanism using estimate to complete.
  • 1Test the conclusion with to-complete performance index.
  • 1State a qualified decision and review signal.
A strong response identifies the relevant evidence, uses estimate to complete as the explanatory link and tests the recommendation through to-complete performance index. It ends by stating that a formula is not a forecast justification unless its future-performance assumption matches the project evidence.
Sia tip — The four points are AskSia-authored practice weighting only.
Glossary

Key terms

estimate at completion
A forecast of total project cost derived from actual cost, remaining work and explicit performance assumptions. Use this definition when the task is to select a forecast formula by stating whether current efficiency is expected to persist.
estimate to complete
The expected additional cost required from the status date to finish all remaining project work. Use this definition when the task is to select a forecast formula by stating whether current efficiency is expected to persist.
to-complete performance index
The cost efficiency required on remaining work to achieve a specified budget or forecast target. Use this definition when the task is to select a forecast formula by stating whether current efficiency is expected to persist.
FAQ

Forecasting Estimate at Completion FAQ

What is the main task in Forecasting Estimate at Completion?

Select a forecast formula by stating whether current efficiency is expected to persist.

How do estimate at completion and estimate to complete work together?

Use estimate at completion to establish the object or condition, then use estimate to complete to explain how it changes the outcome being analysed.

What must a PMGT5889 answer qualify here?

A formula is not a forecast justification unless its future-performance assumption matches the project evidence.

How should I revise Forecasting Estimate at Completion?

Retrieve estimate at completion, estimate to complete and to-complete performance index, apply them to a changed case, and correct the first point where the evidence no longer supports the conclusion.

Study strategy

Assessment move

Reconstruct the relationship among estimate at completion, estimate to complete and to-complete performance index; complete the chapter application without notes; then test the result against this limit: A formula is not a forecast justification unless its future-performance assumption matches the project evidence.

Working through Forecasting Estimate at Completion in PMGT5889? Sia is AskSia’s AI Project Management tutor — ask any PMGT5889 Forecasting Estimate at Completion question and get a clear, step-by-step explanation grounded in how PMGT5889 is taught and assessed. Read this chapter free, then take your hardest questions to Sia.

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