Field notes from the Puncharsoft team on SAP, enterprise application development, integration and digitalization.
Choosing between an off-the-shelf package, custom development and a hybrid model is not a price comparison. It is decided by process differentiation, integration depth, five-year total cost of ownership and lock-in risk. An eight-criteria decision matrix with a TCO table.
N+1 is the most common performance bug in enterprise Java projects, and it rarely shows up in development. We show how to count queries, and when to pick JOIN FETCH, @EntityGraph, @BatchSize or a DTO projection, with code.
Microservices are a deployment and organizational decision, not a badge of quality. We break down the monolith vs microservices call for enterprise Java by team scale, data consistency and operational cost, and show how to build a modular monolith with Spring Modulith.