Case Studies
Case Study: A Behaviour-Change Campaign Across Mwanza and Arusha
26 July 2026 · 7 min read
Development-sector communications in Tanzania fail for a predictable reason: the campaign is designed in Dar es Salaam and delivered in a market that does not share Dar's media habits, language register or trust hierarchy. This anonymised case study covers a health behaviour-change programme across Mwanza and Arusha regions.
Start with who is believed, not who is loudest
In both regions, the trusted messenger was not a celebrity. It was a local health worker, a religious leader or a respected trader. The creative strategy was built to put messages in those mouths rather than around them.
Channel mix
- ✦Community and regional radio in Swahili, with live call-in segments rather than only spots.
- ✦Ward-level roadshows with a mobile screen and a Q&A, not a monologue.
- ✦Printed materials designed for low-literacy comprehension — sequence, icon and colour led.
- ✦WhatsApp broadcast groups run by local coordinators for reminders and follow-up.
Measurement in the field
Baseline and endline surveys, plus weekly coordinator reporting. Reach numbers alone are meaningless in behaviour change; what matters is recall of the specific action and self-reported uptake. Design the questions before the creative.
The reusable lesson for commercial brands
Everything above works for consumer brands outside Dar es Salaam too. Trusted messengers, local language, dialogue rather than broadcast, and field-level reporting. Regional Tanzania rewards presence and patience.