Abstract: Scheduling software provides date and time allocation of resources to a sequence of processes for manufacturing a desired item. Scheduling is performed by a backward-forward method and alternatively by an backward-jump forward method to meet a requested due date. Resources are dynamically allocated to satisfy processes according to pre-established rules for allocation. Also resources are allocated in certain amounts or in a predetermined pattern to minimize waste or left over amounts of the resource. To allocate certain resources, purchase or production of the resource is scheduled first.