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A comprehensive intervention test platform, Valla Coach, including quantitative and qualitative methods to measure and improve work flows on site and promote coaching and collective learning has been developed jointly by researchers and practitioner. The study aims to describe the methodological underpinning of the platform, and discusses the preliminary results and implications.

Expansive Learning Theory grounded in a cultural–historical perspective underpins the conceptual realisation of the test platform. The viability of the platform was tested in four contextually different construction sites (and contractors), combining established and new measurement tools, qualitative intervention approaches and coaching according to the production challenges at hand.

Valla Coach created a space on site where researchers-as-coaches and operatives converged to co-construct (new) knowledge and learn together. The knowledge that emerged from the interactions gained legitimacy through its situatedness and practical value for the operatives.

Valla Coach provides opportunities for researchers and practitioners to probe the taken-for-granted. Moreover, a variety of methods and tools are tested in different contexts. The interventions prompt questioning of assumptions and make contradictions visible. Valla Coach remains work-in-progress and needs further evaluation and validation.

We contribute insights from negotiating socio-technical complexities, evaluating digital measurement tools and technologies and experiences of operatives. Tensions at the interface between the organisation and project are rendered visible.

A bottom–up approach that is a combination of practice-based tools and methods and of theories of learning and sustainable and continuous improvements where the operators are the main actors that enable productive activity.

This chapter insists that evaluation of the process and results of cocreation is a precondition for continuous improvement and helps maintain support from external sponsors and funders. The main benefits of systematic evaluation of cocreation are learning and legitimacy rather than control and allocation. The chapter scrutinizes the two most common evaluation tools, formative and summative evaluation, and finds that they both fail to appreciate the emergent character of cocreation processes. The solution to this problem is to supplement formative and summative evaluation with developmental evaluation, which prompts the participating actors to engage in a critical interrogation of what they are doing, the reasons for doing it, and the results they achieve. Finally, the chapter explains how the commitment of developmental evaluation to using real-time data in the evaluation of change theories can be pursued through a collective impact strategy.