IN our series of papers on Production Control in Aircraft Engineering, we have so far covered the following subjects: (1) Preproduction Planning (Dec. 1942), (2) The Production Plan (July 1944), (3) Shop‐loading (Aug. 1943), (4) Manufacturing Order Control (Jan. 1944), (5) A System of Works Control (September 1943). The British Standards Institution in their booklet 1100, Part I, Principles of Production Control, give 6 subjects as covering the entire field, (1) Scheduling, (2) Machine and Labour Utilization, (3) Stock Control, (4) Manufacturing Order Control, (5) Progressing, and (6) The Production Plan. It will therefore be seen that No. 1, Scheduling; No. 3, Stock Control; No. 5, Progressing, have not been covered. (Note: At this stage, we can assume that No. 2, Machine and Labour Utilization, was sufficiently dealt with in the Shop‐loading paper.)