供应商决策是战略性、长期承诺，而非仅仅是采购。正确的方法应评估契合度、总成本、风险和退出选项，因为稍后切换往往既痛苦又昂贵。
决策检查表
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WHEN EVALUATING A VENDOR / PARTNER
- Fit: does it solve the real need well enough?
- Total cost of ownership: price + integration + operational burden
- Lock-in: how hard is it to leave? what is the exit path?
- Vendor viability: stability, roadmap, support quality
- Security & compliance: data handling, certifications
- Strategic alignment: does it strengthen or constrain our direction?
重点权衡锁定和切换成本；深层依赖很难解开。
具体例子
选择云数据库时，CTO 倾向于选择满足 90% 需求的托管服务，接受中等程度的锁定以获得运维成本节省，但在承诺前确保存在导出/迁移路径并协商支持条款。