The reasons that we need to propose the term of payment as manday :
1. High volume of forms to develop. => All forms and its volume already covered in the estimation and included in the project cost. Thus milestone base payment should have no impact to this item.
2. For avoid issue in UAT phase. Ex. project form change, project form redesign and effect to overall project criteria not compile when inspection. => All change will handle through Change Request Process, which will have additional cost and timeline. This is normal project practice and have no issue with milestone payment
3. The form develop can start immediate, if we use the milestone, we need to wait for milestone such as finish functional spec. With normal project management process development have to start after finish BRS and FS. However, some vendor will take risk to start development in parallel with BRS or FS and it has no impact for milestone payment
4. Flexible to priority the from development. We can discuss and prioritize the form, which have no impact with milestone payment
5. Easy Project Management with time and material process, and project timeline will be close in shorter than propose time frame in price proposal. This also have no impact from milestone payment. Milestone will help us manage project easier than effort payment based ka.
From this reason I don’t think it is convincing enough to apply effort base payment. Please help discuss at your end to apply milestone base payment which is wildly use as standard payment.