BDM Architecture Principle 3: Principle: Favour strategic over interim and tactical solutions. Statement: BDM will favour investment in strategic solutions and technologies over investment in interim and tactical ones. Rationale: Strategic solutions and technologies are those that are selected and deployed with a plan to support service delivery over a long term (10+ years). Tactical and interim solutions are both expected to be replaced by Strategic solutions, either in a relatively short time period (tactical) or over longer term (interim). Implications: • Investments in interim and tactical solutions, unless required for legislative, significant business value/savings or service continuity reasons, will be presented as architecture options with generally lower score for EA alignment than strategic solutions. • BDM will support investments in interim and tactical solutions that are expected to deliver immediate business outcomes when they do not constitute an obstacle to the BDM implementation or significantly increase BDM technical debt. We advise to establish and monitor metrics for identified business outcomes throughout the lifecycle of the investment. • Architecture of the interim or tactical solution may be reviewed if the solution needs to integrate with the BDM solution or support BDM implementation, for instance, by generating data and insights that would inform BDM service design and/or architecture.