Anticipated change comes from the Early Warning Notices. It is vital that the view of change to come (potentially) is kept updated
Just because you know what it means, does not mean the principle contractor or the client knows what it means! When making claims, provide as much information as possible, it makes risk reduction and change control meetings faster and simpler thus helping substantiate your claim.
Performance analysis can provide you with some fantastic insights, but the system needs to be in place first to get these benefits. Examples of performance enhancements include better risk analysis of major project obstructions and supplier spend profiles. Further higher benefits include understanding six sigma for process improvement (lower claim periods in excess of 6 weeks) and improving H&S record (Change control compliance becomes mandatory, not a benefit.)
nec3 is not perfect, but it is an excellent risk & change framework to work within.
Let us evaluate your procedures, change control and contract management