When should you seek, elicit, capture and share knowledge during a project lifecycle?

Question $5$ options:

Only at the beginning when designing the project based on past lessons. That ensures the best possible design and after that there is no time to go look for lessons or document our own lessons.

At the beginning, to design the project based on past lessons and at the end to document lessons from the project itself.

Relevant lessons emerge all the time and unexpected knowledge needs can arise any time during the project lifecycle, therefore knowledge management activities should be undertaken throughout the project lifecycle.

Project specific lessons are not relevant because no project is ever the same and project teams cannot rely on other projects' experiences to achieve success.

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