Abstract: A memory structure and related method for collecting and maintaining data descriptive of a multiplicity of interrelated process flows is disclosed. A complex memory structure includes job entities, operation entities, and process entities. Operation entities are subordinate to job entities, and process entities are subordinate to operation entities. These entities are represented by tables which are linked together to indicate their position in the hierarchy and their sequencing within a process flow. The process entities describe specific activities accomplished by an organization in achieving organizational goals. Typically, resources are either consumed or released, or both, during a process. Bill-of-resource tables are subordinate to process entities and populated with data which identify resources consumed by corresponding processes in the process flow.

Abstract: An apparatus which efficiently coordinates the association of resource and lot data in a manufacturing environment is disclosed. The apparatus includes a memory structure which associates resource and lot data only with other resource and lot data from a common dependency. A dependency is a characteristic of lots which share common resources and of resources which are shared by common lots. The memory includes nodes which describe the dependencies. The dependency nodes link to resource lists and to lot lists. The resource and lot nodes are part of resource and lot lists, respectively. Usage nodes are included to describe every use each lot makes of each resource. The usage nodes are linked to both resource nodes and lot nodes. The usage nodes are also linked together to define the order in which each lot uses its resources and the order in which each resource is used by its lots.