Formative Process Evaluation and Value Based Evaluation for the All Wales Diabetes Prevention Programme (AWDPP)

The principal objectives of the procurement are to:

Commission a partner to undertake external formative process evaluation for the AWDPP.

Obtain an agreement compliant with the PHW NHS Trust’s SFIs for the procurement of the evaluation of the AWDPP.

Ensure value for money principles are adhered to via a procurement provisioned to support a national service.

Through this tender, Public Health Wales wishes to commission a Formative Process Evaluation of the AWDPP. Considering the intervention and assumptions, it is anticipated that the evaluation will answer the following questions in order to understand if the intervention is supporting the prevention of diabetes in Wales.

The evaluation must address interaction with context, implementation (including consideration of value based care and Wales Prudent Healthcare Principles), mechanism of impact, and short term outcomes through participant and practitioner feedback. The formative process evaluation will be addressed through exploration of:

Interaction within context: Understanding the dynamic contextual factors, which influence implementation, intervention mechanism and impact/outcomes. What considerations are needed to support replicability of success across Wales and in different populations?

Implementation: Is the intervention being implemented as planned (model of delivery, fidelity of intervention, resources, level of integration with other services)?; how this is achieved?; what is working well/not?; what are the enablers and barriers to implementation?; who is offered the intervention?; reasons for uptake or refusal?; is the implementation in line with value-based care/prudent healthcare principles?

Mechanism of impact: exploring the causal mechanisms of the intervention; professional and participant responses to/interactions with intervention; participants’ actions following intervention; unintended consequences of the intervention offer/uptake.