Our company Y has various partnerships with other companies to sell products. However, Y is now developing its own application to sell products. Unfortunately, even before developing the product, they have put the product details on websites and sales teams are already trying to sell it. The product is far from ready, with finished development not even reaching 15%. Recently, a sales representative promised a customer that they would showcase the product to them. As a result, they are pressuring us to finish the product within a month. Currently, we have three teams working on Project X, with one team providing technical ideas, another testing UI and features, and our team consisting of three developers who will develop the app based on requirements.
Two years ago, another team worked on the same concept, but they all left, and the company decided to develop the application in-house. About a year ago, they hired us for development, and since then, we have been working on other projects. Unfortunately, we began development of Project X without proper planning about four months ago, along with other projects. Now, the project is allocated to technical and testing teams and is currently in phase one, where basic functionality is being designed. We still need to hire a UI developer for the project, and no further phases have been discussed yet. Hence, no tentative Gantt chart has been developed to declare dates.
However, salespeople keep bombarding us with questions about when the product will be ready and keep suggesting additional functionalities. We want to handle these requests and timelines by having the project done phase by phase rather than trying to achieve everything at once. Unfortunately, we do not have a proper project manager, and everything is being asked of us, which is our first time handling such tasks. Any suggestions would be appreciated.