production management

Planning and control

Although the five M’s capture the essence of the major tasks of production management, control summarizes its single most important issue. The production manager must plan and control the process of production so that it moves smoothly at the required level of output while meeting cost and quality objectives. Process control has two purposes: first, to ensure that operations are performed according to plan, and second, to continuously monitor and evaluate the production plan to see if modifications can be devised to better meet cost, quality, delivery, flexibility, or other objectives. For example, when demand for a product is high enough to justify continuous production, the production level might need to be adjusted from time to time to address fluctuating demand or changes in a company’s market share. This is called the “production-smoothing” problem. When more than one product is involved, complex industrial engineering or operations research procedures are required to analyze the many factors that impinge on the problem.

Inventory control is another important phase of production management. Inventories include raw materials, component parts, work in process, finished goods, packing and packaging materials, and general supplies. Although the effective use of financial resources is generally regarded as beyond the responsibility of production management, many manufacturing firms with large inventories (some accounting for more than 50 percent of total assets) usually hold production managers responsible for inventories. Successful inventory management, which involves the solution of the problem of which items to carry in inventory in various locations, is critical to a company’s competitive success. Not carrying an item can result in delays in getting needed parts or supplies, but carrying every item at every location can tie up huge amounts of capital and result in an accumulation of obsolete, unusable stock. Managers generally rely on mathematical models and computer systems developed by industrial engineers and operations researchers to handle the problems of inventory control.

To control labour costs, managers must first measure the amount and type of work required to produce a product and then specify well-designed, efficient methods for accomplishing the necessary manufacturing tasks. The concepts of work measurement and time study introduced by Taylor and the Gilbreths, as well as incentive systems to motivate and reward high levels of worker output, are important tools in this area of management. In new operations particularly, it is important to anticipate human resource requirements and to translate them into recruiting and training programs so that a nucleus of appropriately skilled operators is available as production machinery and equipment are installed. Specialized groups responsible for support activities (such as equipment maintenance, plant services and production scheduling, and control activities) also need to be hired, trained, and properly equipped. This type of careful personnel planning reduces the chance that expensive capital equipment will stand idle and that effort, time, and materials will be wasted during start-up and regular operations.

The effective use and control of materials often involves investigations of the causes of scrap and waste; this, in turn, can lead to alternative materials and handling methods to improve the production process. The effective control of machinery and equipment depends on each machine’s suitability to its specific task, the degree of its utilization, the extent to which it is kept in optimum running condition, and the degree to which it can be mechanically or electronically controlled.