This paper describes a new algorithm for the automated design of compensators for space booster control systems. Use of this algorithm results in the selection of a forward-loop compensation filter (or filters, if filter switching is used), and a compatible time-dependent gain schedule which will stabilize the booster for a complete ascent stage by producing an open-loop gain versus phase response which satisfies a set of specified stability margins at critical flight times. The digital computer routine is based on minimizing a non-linear penalty function which is a function of the violations of the specified stability margins. Gradient search techniques are used to carry out the minimization of the penalty function. The results of considerable experience with the use of this programme by the authors and by several design engineers who were not involved in the development of the algorithm are summarized. These results clearly establish the substantial time and cost savings achieved by use of the automated design routine over design by the more conventional and classical Computer-aided design techniques available prior to development of the algorithm. Some convergence problems encountered during development of the programme are discussed and the results of various relatively successful attempts to resolve these problems are presented. Finally, some planned improvements and extensions of the algorithm are described.