Planning production

Use of Results. Sales analysis data are used ia many ways by company management. The results are most useful ia production planning, particularly if grade differences appear to be ia the offing, and ia assuting that adequate suppHes are available for sales. Inventory control, raw material procurement, technical service requirements, and trends ia accounts receivable are beneficiaries of good sales analyses. 

Phase 4 - Production Planning. The critical process operations from Phase 3 are ranked with production requirement issues, ultimately translating the important customer requirements to production planning and establishing important actions to be taken. 

The way many companies identify resource requirements is to solicit resource budgets from each department covering a 1 to 5 year period. However, before the managers can prepare budgets they need to know what requirements they will have to meet. They will need access to the corporate plans, sales forecasts, new product development plans, marketing plans, production plans, etc. as well as the quality policies, objectives, and procedures. 

Audit of design and production plans to establish that, if followed, they will result in compliant product... 

A statement of work which you require the subcontractor to perform - it might be design, development, management, or verification work and will include a list of required deliverables such as project plans, quality plans, production plans, drawings, test data, etc. You need to be clear as to the interfaces both organizationally and technically (see Part 2 Chapter 4). 

The production plan referred to previously is a work instruction, as it instructs those to whom it applies to carry out certain tasks. Control procedures may include assembly procedures, plating procedures, painting procedures, maintenance procedures, etc. and differ from process specifications (see later) in that the process specification defines the results to be achieved in operating a process rather than how to run the process. In addition to the list of contents provided in ISO/TS 16949 clause 4.9.2, the documentation should define ... 

The product specification should provide all necessary processing requirements that need to be implemented when carrying out particular processes however, some of the requirements may need to be defined in separate process specifications which are invoked by reference. You may need to develop your own process specifications, but there are many national standards that may suit your needs and they come with the added benefit that they have been proven to work. The quality plan or procedures should not contain any further product requirements but may provide the verification methods to be employed, the precautions to be observed and the recording requirements to be met. You need to identify in your production plans each of these documents at the stage at which they should be applied, otherwise there is the possibility that they may be overlooked. 

Don t work to instructions unless provided in the quality system procedures, product specification, production plan or in approved change notices or remedial action instructions or by the nonconformity review board. 

The answer to this question will depend on two factors the frequency with which the CT occur, and the likelihood of errors arising when performing these tasks. The frequency of the interactions can usually be specified relatively easily by reference to plant procedures, production plans, and maintenance schedules. The probability of error will be a fimction of the PIFs discussed extensively in Chapter 3 and other chapters in this book. In order to obtain a measure of error potential, it is necessary to make an assessment of the most important PIFs for each of the CT. 

Table 35.5 Air consumption of pneumatic equipment Examp/e of ca/cu/af/on The following calculation is typical of a medium-sized engineering workshop including a foundry, where a high degree of mechanization is to be carried out by means of compressed air-driven machines and tools. Listed in the table are the tools and other pneumatic devices which are expected to be included in the installation at full production capacity. The use factor of the different tools is calculated in connection with production planning and thus it is possible to establish the average total air consumption.

Process development with particular attention to process profitability and safety and minimization of the environmental impact is presented in Chapter 5. A brief description of the present practice in scale-up, development, and production planning is given and the most promising trends and achievements are presented. Recommendations are given how to achieve success in the scale-up of a process a successful scale-up can be defined as the procedure that allows the same yields and product distribution in a full-scale plant as on a small scale. 

Criteria and constraints in production planning, scheduling, and design of batch plants... 

For most applications the makespan criterion is applied. For a very heavy load of the plant, the tardiness might be the most appropriate criterion that will enable to keep delivery dates undue. No matter which criterion is used, scheduling is always a problem of combinatorial character a large number of sequences must be simulated and the best combination chosen. Contrary to production planning, the problem of optimal scheduling is considered to be deterministic and static. This means that all problem parameters are known in advance and remain unchanged during the realization of the schedule. 

Several subproblems of design, production planning, and scheduling of batch plants have... 

The death of old products, the birth of new ones, changing demands, and the need to compose the optimal hierarchical production plan with an optimal use of the equipment and the shortest possible total production time make the timing of production more important than plant design. The use of rigorous optimization techniques can be most profitable at production planning and scheduling of existing batch plants, especially multipurpose plants. 

Production planning includes considerations on production objectives over a certain time horizon given marketing forecasts for prices and product demands, equipment availability, and inventories. This is a macrolevel problem of the allocation of production capacity, time, product inventories, and labour and energy resources, so as to determine the production goals that maximize the total profit over an extended period of time into the future (e.g. a few months to a few years). 

Birewar and Grossmann (1990a) proposed a model for the simultaneous determination of the best production goals and the best allocation of tasks to the equipment units. They incorporated inventory costs into the objective function. To keep commitments that have been made at the stage of production planning, a penalty PNu) was incurred in the objective function for not meeting the commitments for product i in interval r as a linear function in terms of the shortfalls SFn) ... 

The farmer should keep the distributor/wholesaler informed of production plans, and must give the buyer as much notice as possible of any change in plans. This will provide an opportunity to line up another supplier (Roos, 2002). Some wholesalers offer farmers longterm contracts which guarantee price premium for organic products over several years. 

At this level, research focuses on planning, production engineering and management, supply of material resources, transport waste material processing and maintenance. Energy flows are closely related to the running of these activities that may be affected by production plans, scheduling times and parameters. 

Chiotellis, S., Weinert, N., and Seliger, G., 2010. Simulation-based, energy-aware production planning, Proceedings of 43rd CIRP International Conference on Manufacturing Systems, Vienna, Austria, pp. 165-172. 

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