Frequently Asked Questions
Not all activities will merit or need an allowance for risk of time overruns, only those that have specific risks that can be identified and calculated by some form of risk assessment. The project manager is entitled to see this broken down in that way to understand why you have made each allowance and how you have calculated it. Without that they will not be able to decide if your plans are practicable and realistic.
In addition, without such a breakdown, it will be impossible for the project manager to see whether
any particular delay to an activity caused by a compensation event is on the critical path, in the sense that there is no float to absorb it.