I have:
- a database of simple events concerning a group of animals, for example: an animal is born, an animal gets some medicines prescribed, an animal is inseminated, an animal gives birth
- a set of rules for predicting future events: an animal dies after N years, gives birth M days after insemination, and so on.
Do you know any engines which allow calculating (or simulating) status for a specific day in the future, taking into account historic events and future (predicted) events? By status I mean exact statistics like: number of living animals, medicines needed for a given day and so on. It is needed to visualize trends in the group and experiment with parameters of the rules.