In a commercial context there may be a need for more than one Risk Register as some project risks could be unique to only one party, with good reasons for them not to be visible to the other party.
Where a joint Risk Register is used, care should be taken as to whose risk it really is, and the risk owner appointed accordingly.
For example, on a fixed-price contract any cost overruns will impact the supplier’s Business Case, but timescale overruns will typically impact mostly the customer’s Business Case.
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