The objective of drafting the change is to plan and design the change, i.e. find out in detail how the change affects the Forms, Data Model and Customer Data.


If the change is large (e.g. 20 to 80 hours), you must consider making some application model changes and demonstrate these to your customer, to make sure your design meets the objective.


For smaller changes, you can go to the Build phase.


However, you must always stop and think, that is, pay a due amount of consideration of how the change affects your application model (Forms, Data Model etc) and Customer Data.


A customer sign off is not required to move on.