Constraint on impact

Not every shortfall in a project's results comes from how well the assessment was conducted. Some of it comes from the world the project operates in refusing to cooperate. The workbook draws this line through a case-study question, and calls the second kind a constraint on impact.

Its own worked example: a skilling programme trains young people for jobs, but "demand for specific skill sets in the market and supply of trained members under this project do not match." That mismatch is a constraint on impact — nothing the assessor measured wrong, and nothing the trainers taught wrong; the labour market itself simply does not have room for every trained candidate.

The workbook's Chapter 8 sample question deliberately mixes four options together, three of which are challenges in conducting the SIA and only one of which is a genuine constraint on impact:

The workbook's explanation is direct: "Impact of the project will get affected by demand and supply in the employment market. Rest constraints are related to challenges in conducting SIA." The distinguishing test is whether the limitation sits outside the project's control in the real world (a constraint on impact) or inside the process of measuring and evidencing what happened (a challenge in conducting the assessment).

A skilling NPO trains 500 youth in digital marketing skills over a year, at a cost of ₹42 lakh. At the end of the programme, only 210 (42%) secure jobs in digital marketing roles within six months.

The NPO's own review finds the training quality was strong — trainee assessments and employer feedback on trained candidates are consistently good. But the local job market has only around 250 digital marketing openings a year across the district, against 500 candidates freshly trained by this and two other similar programmes combined.

This is a constraint on impact: the shortfall is not because the assessment missed something, or because indicators were poorly chosen — it is because the market genuinely cannot absorb every trained candidate. A social impact assessor reporting on this project would need to name the demand-supply mismatch explicitly, rather than attribute the 42% placement rate to a flaw in the training itself.

Chapter 8's sample questions test this exact distinction directly, contrasting a market-driven constraint on impact against data and measurement challenges in conducting the assessment. Expect a scenario question listing four limitations and asking which one is a constraint on impact rather than an assessment challenge.

• A constraint on impact is external to the project — typically a market or demand-side condition — not a flaw in how the assessment gathered or measured data.
• The workbook's own example is a labour-market demand-supply mismatch — a question is likely built around a similar external, market-based scenario.
• Do not label every data or measurement problem a "constraint on impact." Missing alumni data, unclear participant explanations and narrow indicator sets are all explicitly labelled challenges in conducting the SIA, not constraints on the impact itself.
• This distinction matters for contribution: a genuine constraint on impact affects how much impact a project can realistically achieve, which is a different question from how much of the achieved impact should be credited to the project rather than external factors.