The BEST time to identity metrics to measure the performance of an IT-enabled investment is during:

System implementation is too late to define success metrics; they should be established upfront to guide the implementation.

Project initiation sets the project scope, but business case development specifically details the expected benefits and how they will be measured.

Investment feasibility analysis assesses viability, but business case development goes further to quantify benefits and define performance measures.

During business case development, the expected benefits, objectives, and value proposition of an IT-enabled investment are clearly defined and quantified. Identifying performance metrics at this stage ensures that they are directly linked to the desired outcomes and provides a basis for tracking whether the investment delivers its intended value throughout its lifecycle.