Advise solution - project tracking system.

It is necessary to choose a not very sophisticated project management system.
Task - project management in an advertising agency: the production of souvenirs.
It is necessary that in the functionality of the system it was possible to add a project, design executors, third-party production organizations, monitor the project status (in production, in development, shipped to the warehouse, shipped to the client, etc.)
It is necessary that it was possible to give projects a priority and measure time for solving each stage.

If someone knows where there is documentation or articles on the creation of such systems, it is also good, as it was originally intended to write such a system from scratch as an intranet site.