Outcome review
12–36 months post-implementation: reconcile promised outcomes with official indicators and community feedback; health and equity breakdowns throughout.
For commissioning organisations
Independent proof when policies have had time to show their effects
DDPP supports central government teams and local authorities that need rigorous, population-level evidence — especially where the original business case rested on pilots, surveys or modelling that now needs testing in the real world.
Proof matrix
Commissions are scoped as domain + geography + claims + elapsed time. Health and equity are proof lenses on every row — not separate workstreams.
| Policy domain | Health — what we proof | Equity — what we proof |
|---|---|---|
| Transport | Active travel, injuries, air quality exposures | Access by income and disability; journey burdens; job reach |
| Housing & place | Overcrowding, fuel poverty, cold homes | Tenure, displacement, affordability by cohort |
| Economic growth | Inactivity, work-related stress, demand pressures | Who gained jobs and pay; spatial distribution of growth |
| Education & skills | Progression to employment; time poverty barriers | Uptake by deprivation and cohort; workplace reach |
Example commission: 18-month outcome review — bus reform in Greater Manchester; access, air quality and equity by deprivation decile.
Typical commissions
Stress-test & sensitivity
Test whether results hold under alternative geographies, time windows and demographic cuts — exposing fragile claims before scale-up decisions.
City–region assessment
Analyse urban schemes alongside commuter belts and neighbouring authorities — spillovers, displacement and shared infrastructure.
What you receive
- Executive summary for decision-makers (continue / adapt / scale / stop)
- Methods annex citing data sources, lags and limitations
- Indicator dashboards and small-area tables where appropriate
- Community evidence synthesis from forums and polling
- Health and equity disaggregation on every material claim
- Optional workshop with policy, analytics and delivery teams
Informal consultation follow-up
Where you have already held an informal consultation and recorded summary proposals, DDPP can host a secure follow-up exercise: respondents sign in with anonymous credentials and vote on each proposal (Support, Neither support nor oppose, or Oppose), with an optional comment. Commissioners upload proposals, issue credentials, and export timestamped results from a D1 database.
How engagements start
A short scoping conversation covers the policy domain, geography, original claims, elapsed time since implementation and the decisions the commission must inform. We then propose a fixed-fee or staged scope with clear deliverables and timelines.