The best time to decide what matters is before you know which supplier benefits from the decision.
The 2009 NSW Government Tender Evaluation Plan worked example is one of the strongest Week 6 sources. It defines price and non-price criteria before evaluation, uses a two-envelope process, establishes scoring scales, requires consensus, records clarification and sets approval arrangements.
The particular numbers are historical and example-specific. The underlying governance principle is more durable.
Evaluation should be designed before tenders are seen.
The Strategic Context
Tender evaluation converts business priorities into a supplier decision.
That conversion is not neutral.
If price carries 60 per cent weighting, the buyer is saying something about the relative importance of price.
If methodology carries 15 per cent and personnel carries 5 per cent, the buyer is making another judgement.
The spreadsheet does not create those priorities. Leadership does.
Weighted evaluation is therefore a decision model, not merely a calculation.
What Leaders Commonly Misread
The first mistake is believing numbers eliminate judgement.
Weightings, scoring anchors and criteria all contain judgement.
The second is assuming the highest total score automatically equals best strategic value.
A scoring model can only calculate the decision architecture it has been given.
The third is changing criteria after seeing the bids.
The fourth is using criteria that sound desirable but do not predict performance.
The fifth is assuming the 60:40 price/non-price ratio, four-point “equal best value” range, 10 per cent loadings or historical ISO preference in the worked example are general rules. They are not safe to generalise. [FACT CHECK REQUIRED]
Reframing the Issue
Tender evaluation should be treated as pre-committed decision logic.
Before bids are opened, the organisation should state:
- what matters;
- why it matters;
- how evidence will be judged;
- what is mandatory;
- how price will be incorporated;
- who makes the decision.
This reduces the temptation to redesign the model around a preferred supplier.
Strategic Analysis: False Precision
Suppose three suppliers score 82.4, 81.7 and 80.9.
The decimal points can create an impression of scientific certainty.
But if evaluators cannot explain the difference between a score of 80 and 90 consistently, the precision is artificial.
The worked example recognises this challenge by giving descriptive scoring anchors and requiring consensus.
A stronger evaluation model therefore focuses not only on arithmetic but on the quality of evidence behind each score.
Another risk is criteria overlap. “Experience”, “capability” and “methodology” can accidentally reward the same evidence several times.
Decision Framework
Build evaluation around six tests.
Relevance
Does each criterion predict the supplier's ability to deliver the required outcome?
Distinctness
Does it measure something different from other criteria?
Evidence
What tender information demonstrates performance against it?
Scale
Are scoring anchors clear enough for evaluators to apply consistently?
Weight
Does the weighting reflect strategic importance?
Governance
How are conflicts, consensus, clarification and approval controlled?
This is more important than choosing a sophisticated formula.
From Strategy to Execution
Immediate action: freeze evaluation criteria and governance before opening tenders, subject to applicable rules.
Medium-term capability building: train evaluators to score evidence rather than writing quality or familiarity with the bidder.
Long-term strategic positioning: compare evaluation scores with actual supplier performance after award.
If highly scored criteria do not predict delivery success, the organisation should redesign the model.
Governance Implication
Evaluation governance should also protect against conflicts of interest and authority drift. Evaluators may have technical preferences, prior relationships or knowledge of incumbent performance that is relevant in some criteria but inappropriate in others. The process should make clear what evidence may be used, how conflicts are declared and who has final approval authority.
Consensus is useful when it produces a reasoned common view. It is not useful when strong personalities simply pressure others to change scores. Evaluation records should therefore preserve the evidence and reasoning behind the final position, especially where initial scores differed materially.
The best evaluation report should allow a senior approver who was not in the room to understand why the recommended supplier offers the best fit against the pre-defined decision model.
Evaluation models should also be tested before release using hypothetical offers. A dry run can reveal criteria that are impossible to score, weightings that produce unintended outcomes or formulas that distort price differences. Testing the model before bids are visible improves decision quality without favouring any supplier.
Signals to Monitor
Watch for criteria added after bids are received, large unexplained differences between evaluator scores, incumbent reputation influencing unrelated criteria, price formulas no one can explain and evaluation reports that state scores without evidence.
Another signal is consistent supplier underperformance despite “excellent” tender scores.
Questions for the Leadership Team
- What supplier behaviours or capabilities actually predict success?
- Are the criteria measuring those things?
- Why does each weighting have its current value?
- Can evaluators distinguish scoring levels consistently?
- Are any criteria double-counting the same strength?
- How will actual contract performance be used to improve future evaluations?
Closing Perspective
Evaluation quality begins before the first bid is opened.
A scoring model is valuable when it disciplines judgement, not when it disguises judgement behind arithmetic.
Design the decision before you know who will win it.
Related article: From Lowest Price to Best Value: The Economics Leaders Miss in Procurement
Related article: Supplier Due Diligence Before Award: Can the Preferred Tenderer Actually Perform?
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