Abstract: A method, system and program product are described for implementing an integrated circuit. Synthesis tools and a continuum of physical constraints are used to generate a physical realization of a circuit from a hierarchy of logical circuits. Missing physical constraints are generated based on the behavior of the logical circuits, technology rules, timing constraints, and user controls. These constraints are refined throughout the process to produce an accurate physical realization. Generation of the physical constraints is user-controlled, allowing for a full continuum of input.

Abstract: A system is implemented for controlling long running electronic design automation tools. A user may modify the running of the tool in real time using an interface at the user computer. The user computer accepts user input and communicates with a computer running the design application. The design application runs normally unless a user enters input requiring modification of the process being run by the design application.