Extensive research in strategic management has shown that more than half of the business strategies fail to accomplish their intended objectives due to problems with strategy implementation. However, in comparison to strategy formulation, strategy implementation has received insufficient attention both at the theoretical and empirical levels. The objective of the study was to develop a comprehensive model that augments the effectiveness of strategy implementation in the context of a developing economy. A sample of 229 top and middle-level managers of commercial banks was chosen to collect quantitative data, and around 187 (82%) questionnaires were returned. The quantitative data analysis was carried out using structural equation modelling. By operationalizing strategy implementation capability as a second-order reflective-formative construct, the study established an empirically informed strategy implementation model that entails three components, namely, critical strategy implementation-related resources, key elements of strategy implementation capability and strategy implementation performance. The study contributes to the existing knowledge on strategy implementation by expanding the extant strategy implementation frameworks/models to a broad-based and integrative model.