What do you do with people who drop out of projects?

Question

Project management

In short, there is a person in the team without the necessary knowledge, but despite this, he must be occupied with something. It is impossible to remove him from the team. There is no point in teaching. such projects are no longer foreseen (I affirm this with 99.(9)% confidence).
PS Application for android.

Answer 1

Perhaps send to study the methods of promotion of the application after launch. Establish contacts with news portals and blogs on the subject in order to post an overview article of the application on them.
It is possible to take care of the design and content of the application site, if there is one or is planned.
Perhaps harness it with an analysis of competing applications, let him compile summary tables: functionality, pros and cons. Here, the study of customer reviews of competitors to determine the points that are important to the consumer.
Of course, this only works if you are developing a commercial product. Although the latter is also useful for internal development
. UPD: Well, if a person writes correctly, sit him down to write documentation!

Answer 2

Execution, fourth and exile to Siberia (the order can be changed to taste).
No job - no vacancy, there is a job - there is a vacancy. Borrow and teach on the basis of the projects that are foreseen.

Answer 3

Let's learn something new that will come in handy in the next project.

Answer 4

Sell ​​into slavery - sorry, I couldn’t resist)
Indeed, it happens that a person seems to do nothing, but you can’t drive him away, because it can be a family member or best friend (a common mistake in starting a business).
Solution: instruct him to do something for the future, up to the creation of a new idea and its initial organization.
It is possible that he will come up with something new, because you are not going to completely abandon the development of new "products".
Good luck!