这一概念有多种形式，学者和政策制定者对理想项目的框架、范围和成本存在争议。

The concept has multiple forms, and scholars and policymakers argue about the shape, scope and cost of the ideal program.

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在信封框架的这一层级上，项目经理和项目发起人一起来管理项目和产品的关系，并确保项目范围、进度和预算是受控的。

It is at this level that the project Manger works with the project sponsors to manage the project and product relationship and works to ensure that the project scope, schedule and budget are managed.

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参考体系结构提供一个用于确定项目范围、评估差距和评估风险的框架，可以为设计和实现解决方案开发一个路线图。

They provide a framework for scope identification, gap assessment, and risk assessment to develop a roadmap to design and implement a solution.

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