After reading the Mythical man-month, I realized that the concept integrity is very important. extended, the Project Management System in PMBOK is already a verified management concept, to do a good job in a project, you must pay attention to all aspects of the project. Even if you don't pay attention to it, they actually exist. Therefore, I think that a mature project manager must first have such a complete project management concept in mind, but in small companies, due to inadequate conditions, it can weaken sub-concepts with low priorities (such as HR), but it is only weakening, not non-existent. in a certain period of time, you must pay attention to it, it may appear as the highest priority in project management. After all, management in a specific project is active.
Therefore, I think "conceptual integrity" is very important, not only in terms of business, but also in terms of management.
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