3GPP 21.900 v20.0.0 — the document's own text
6.0.1 Introduction: why manage a project?
Taught in 6. Work Items and Study Items — how the work is authorised (How standards actually get made, in depth).
In any complex engineering venture, it is necessary to plan the project, to monitor its progress, and to be able to determine whether it is being completed on schedule and within budget. In many ways, the concepts and constraints which apply to an engineering project can also be applied to system standardization activity.