Engineering leaders can improve predictability and reduce scope creep by evaluating Product Managers' output quality using five key proxies: the frequency of requirement changes, the clarity of acceptance criteria, prioritization of technical debt, attention to security and platform features, and balancing investments across product, security, and platform capabilities. These measures help create a healthier balance between innovation and technical debt, resulting in more predictable releases and reduced team burnout. Predictability in engineering is challenging due to the tension between business demands and the need for well-planned sprints. Scope creep often arises from unplanned changes, categorized as bug creep or feature creep, with feature creep being a sign of poor product management. Consistent feature creep indicates potential management issues, as product management success can be difficult to measure. By focusing on clear requirements, acceptance criteria, and technical debt, and by ensuring proper investment balance, engineering leaders can better assess the quality of a Product Manager's work.