The document discusses the considerations around whether to build a sales performance management system in-house or subscribe to a software-as-a-service (SaaS) solution. Building a custom system can be very expensive due to development and maintenance costs and may not provide improvements over time. Subscribing to a SaaS solution offers lower costs, faster implementation, flexibility, integrated processes, and reliability due to expertise from purpose-built vendors. The document analyzes factors around resources, complexity, timelines, and costs to evaluate the best approach.