Evolution of Manufacturing Environment The field of production planning and control has undergone tremendous change in the last 50 years. Prior to the 1960s, inventory was controlled by a manual system, utilizing various techniques: stock replenishment, reorder points, EOQ (economic order quantity), and ABC classifications, to name a few. By the mid-1970s, enough experience of material requirements planning (MRP) had been gained and the importance of the master production schedule (MPS) was realized. In the 1950s, MRP was the first off-the-shelf business application to support the creation and maintenance of material master data and bill-of-materials across all products and parts in one or more plants. These early packages were able to process mass data but only with limited processing depth. From the 1940s to the early 1960s, material control consisted of basic ‘order point’ formulae used to maintain a level average inventory balance. In 1965, Joseph Orlicky of the J. Continue reading
Operations Management Techniques
The Seven Wastes of Lean Manufacturing
There are differing opinions on how many ‘types’ of waste an organisation might have. Current thinking suggests, seven, eight, or even nine depending on the nature of the organisation and the type of work carried out. Originally, there were said to be seven types of waste, and these were largely found in manufacturing organisations. They can be listed as: Overproduction Excess inventory Waiting (lost time) Unnecessary motion Unnecessary transportation (double handling, or moving excess stock) Re-work (poor quality) Over-processing (over-engineered) In each instance, it is recognized that even incremental improvements can help an organisation to increase its efficiency and reduce its costs. These savings and improvements are typically realized in a greater proportion of better quality output, meaning that even small improvements can have an exponentially large positive outcome. It is also noted that each one of these seven types of waste can be tied to different types Continue reading
Techniques or Tools Used for the Design of Good Plant Layouts
An ideal plant layout should provide the optimum relationship among output, floor area and manufacturing process. It facilitates the production process, minimizes material handling, time and cost, and allows flexibility of operations, easy production flow, makes economic use of the building, promotes effective utilization of manpower, and provides for employee’s convenience, safety, comfort at work, maximum exposure to natural light and ventilation. It is also important because it affects the flow of material and processes, labor efficiency, supervision and control, use of space and expansion possibilities etc. Recommended Reading: Plant layouts – Definition and Objectives In designing or improving the plan of plant layout, certain techniques or tools are developed and are in common use today. The techniques or tools are as follows: 1. Charts and Diagrams: In order to achieve work simplification, production engineers make use of several charts and diagrams for summarizing and analyzing production process and procedure. Continue reading
Objectives and Principles of a Good Plant Layout
Plant layout is a plan for effective utilization of facilities for the manufacture of products; involving a most efficient and economical arrangement of machines, materials, personnel, storage space and all supporting services, within available floor space. A good rather an ideal layout is one which provides maximum satisfaction to all concerned i.e. shareholders, management employees and consumers. Objectives of a Good Plant Layout Only through an efficient layout, the organization can attain the following objectives: Economy in handling of materials, work-in-process and finished goods. Minimization of product delays. Lesser work-in-progress and minimum manufacturing cycle time. Efficient utilization of available space. Easy supervision and better production control. Greater flexibility for changes in product design and for future expansion. Better working conditions by eliminating causes of excessive noise, objectionable odor smoke etc. Principles of a Good Plant Layout Overall integration of factors: A good layout is one that integrates men, materials, machines Continue reading
Modularity – Definition and Advantages
Modularity is a degree to which a system’s component maybe separated and recombined. However, it can be used in different contexts and its definition changes accordingly. For example. In Biology, it is the concept that organisms or metabolic pathways are composed of modules. In Nature, modularity refers to the construction of a cellular organism by joining together standardized units to form larger compositions. In cognitive science, the idea of modularity of mind holds that the mind is composed of independent, closed, domain-specific processing modules, etc. But here we will be concentrating on Modularity in operations management, which refers to an engineering technique that builds larger systems by combining smaller subsystems. The growing concern for the environment has spurred a great interest in environmentally aware design and manufacturing amongst designers worldwide. Introducing Modularity in consumer products can help bring multiple manufactures come together creating differentiated assembly lines that can decrease the Continue reading
Seven Basic Tools of Quality
For the reason of human factor and human reliability, it is inevitable that there could be occurred some kind of faults and errors even in well planned and technically equipped organizations and systems. The errors or unplanned risks that might be happened during the project, can lead the customer to have negative opinion about the management team. Also some faults and risks might not being able to fix or might be too expensive to overcome it. Therefore a well prepared quality management plan is essential for an organization in order to ensure that the management plan that the project team works on, meet the customer satisfaction and their needs. At this stage Ishikawa’s seven quality tools are quite helpful to determine, identify and evaluate the problems, their causes and suggestions for a continuous improvement process. These tools can be listed as; Histogram, Flow Chart, Scatter Diagram, Pareto Chart, Cause and Continue reading