What is a job evaluation scheme?
A structured method for determining the relative size of jobs within an organisation, so that pay can be set on a consistent basis rather than through individual negotiation — and it is the main defence against equal pay claims.
The problem it solves. Without a systematic method, pay reflects who negotiated well, who was recruited when the market was tight, and who had a sympathetic manager. That produces inconsistency that is difficult to justify, and where the inconsistency correlates with sex, it produces liability.
How analytical schemes work. The job — not the person — is broken into factors, each scored:
Knowledge and skills required.
Responsibility for people, budgets, assets or decisions.
Complexity and problem-solving.
Physical and emotional demands.
Working conditions.
Factors are weighted, scores totalled, and jobs allocated to grades by score band.
Why analytical schemes matter legally. Under equal pay law, a job evaluation study can establish that two different jobs are rated as equivalent, founding a claim — or, where the employer relies on it, demonstrate that a pay difference reflects genuine differences in job demands. A scheme is only a defence if it is itself free of sex bias, which is the critical qualification.
How schemes can be discriminatory despite appearing neutral:
Factor selection. Including physical strength while omitting emotional demands or dexterity systematically favours roles predominantly held by men. The factors chosen encode assumptions about what is valuable.
Weighting. How much each factor counts is a judgement, and small weighting differences move whole occupational groups.
Application, where evaluators' assumptions influence scoring of familiar roles.
This is precisely what large public sector equal pay claims have examined, and schemes have been found wanting.
Non-analytical methods — ranking, paired comparison, job classification — are simpler and do not provide the same legal protection, because they compare whole jobs rather than analysing demands.
What it is not. Not performance appraisal — it evaluates the role, not the holder. Not a market pricing exercise, though market rates are then applied to the resulting grades, which is where market supplements and their own justification problems arise.