In unclear or high risk environments, your stages should be short. In known terrain with a group of experts you trust, the stages can be long.It is difficult to come with a specific recommendation, but for an average project with total duration of approximately 12 months, this could make sense:
- You should count Starting up a Project duration in unit of days – something like 10 days.
- You should count Initiation Stage duration in unit of weeks – something like 6 weeks.
- You should count duration of delivery stages in number of months – but usually not more than 2-3 months per stage.
The first stage in a PRINCE2 Project is always the Initiation Stage. Note that there is no such thing as a closing stage, there is just the last stage including the "Closing a Project" process.
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