You really need to get round the table to agree an original baseline programme as otherwise you will have nothing to be able to assess any change against. Both Parties should see the issue with this and want to rectify it as soon as possible. Neither party should have allowed this to get to five months without having the first Accepted Programme.
In the background I would also be doing the revised programme ready for issue as this should be the programme that you should be working to as your real management tool. You could submit this and even have this become accepted to show where you are at going forward, and then once the original gets accepted you can look to show what the changes were in that period.
You need as a matter of urgency to get both the first programme accepted as the baseline and the current programme accepted as to where you are. Then you need to maintain the accepted programmes going forward, and also do a retrospective analysis on anything that happened between the original baseline programme and the first revised Accepted Programme if planned Completion has moved in the form of compensation events.
In the background I would also be doing the revised programme ready for issue as this should be the programme that you should be working to as your real management tool. You could submit this and even have this become accepted to show where you are at going forward, and then once the original gets accepted you can look to show what the changes were in that period.
You need as a matter of urgency to get both the first programme accepted as the baseline and the current programme accepted as to where you are. Then you need to maintain the accepted programmes going forward, and also do a retrospective analysis on anything that happened between the original baseline programme and the first revised Accepted Programme if planned Completion has moved in the form of compensation events.