What kind of images do I need? What is the delay to obtain them?

This paper presents a software architecture that first suggests concurrent sets of images that can be used to answer a thematic issue, second, sorts the sets of solutions to match user preferences, and third, gives a mission planning scheme for image acquisition in order to have an estimate of the overall delay required to solve the thematic problem. The main characteristics of this architecture are that problem analysis and decision making are separated in order to satisfy a large number of users and that mission planning uses a scheduling algorithm that globally plans all ground based and on orbit activities from problem statement to problem resolution