TOBAC1 is part of a test management system for object-oriented software.A test case browser built under the Smalltalk-80 environment to dejire, manage and execute test cases is introduced.The main benejit of TOBA C is support for regression testing of complex objects.TOBAC is selfadaptable to the structure of an arbitrary complex object.

A complete datamodel for an integrated VLSI design system is developed in a stepwise manner. This datamodel introduces a unified view of all design domains and hierarchy levels that result in a considerable simplification of the communication among the design tools. We defined five basic objects: cell, interface, contents, instance and configuration for high level description of all design data. The model also covers views, types, alternatives, versions and the design history. In particular our handling of the configuration demonstrates reasonable response times, due to the strict avoidance of redundant information and the storage of complex objects. This datamodel can be directly used for the implementation of an efficient object-oriented design database.

The framework of the PLAYOUT design system supports hierarchical decomposition, multiple representations, realization alternatives, versioning, and concurrency. It includes a universal meta data schema, based on an object-oriented data model, a design database, and a design flow manager. The design work is done by toolboxes. A methodology for interfacing the toolboxes and the database system, called the data management interface, is presented. It handles the exchange of the design data as a toolbox transaction. This nonstandard transaction includes the data retrieval and preparation for the toolbox, synchronization with other transactions, and consistency check of the toolbox output data. If the check fails, the transaction in reset and the toolbox data are removed from the database. The toolbox transactions are started by the design flow manager. New toolboxes can be easily adapted to this framework by adding a toolbox description written in an object-oriented retrieval language.>