Introduction: Patient Navigation Program (PNP) act as an intervention tool that resolve and overcome various obstacles that patients face as they navigate through healthcare system. This makes the use of PNP worth to be widen but delivering needs of PNP involves high efforts. Thus, Service Oriented Product Line (SOPL) is introduced as systematic approach in identifying reusable core assets to reduce time and effort in developing new PNP. Consequently, due to reusable nature of core assets, evaluating its reusability is crucial to determine the development performance. Therefore, this paper measures reusability of core assets to ensure that core assets development approach can lead to highly reusable core assets. Methods: Reusability Matrix for Functional Commonality (FC) and Modularity (MD) is considered to compose core assets without much complication. Reusable core assets derived from two different development approaches is used as input where matrix of reusability evaluation is applied. The approaches includes an approach from previous existing study and enhanced approach with implementation of Business Process Feature Model (BPFM) and Trade-off Analysis. Evaluation results is compared using reusability matrix to identify which approach contributes to higher core assets reusability. Results: From overall results, enhanced approach shows an improved reusability by achieving 92% of FC results compared to existing approach, while results of MD remains the same. Utilizing BPFM and Trade-off Technique is proven to be the contributing factor in higher reusability. Conclusion: This study concluded that reusability of core assets can be improved with a comprehensive core assets development approach.