Firstly, bill rates should only be used for the assessment of CEs by agreement. This agreement should be made on an individual, CE by CE, basis.
If you are intending to use bill rates to assess a CE then you should not be adding Fee (there is no General Fee, there is direct fee and subcontract fee) to the bill rate.
If a BoQ quantity has increased (or reduced) and qualifies as a CE then the assessment of the CE should be based on Defined Cost + Fee
If you are intending to use bill rates to assess a CE then you should not be adding Fee (there is no General Fee, there is direct fee and subcontract fee) to the bill rate.
If a BoQ quantity has increased (or reduced) and qualifies as a CE then the assessment of the CE should be based on Defined Cost + Fee