Plant And Shop Layout

Plant And Shop Layout

Introduction

In a manufacturing organization, a job to be manufactured spends most of the time in moving and waiting. For reduction of this moving and waiting time of jobs/parts, it is necessary to have proper layout and proper scheduling procedure. Plant layout specifies the position of the overall arrangement of the various facilities such as equipment’s, material, manpower, materials handling, service facilities, and passage required to facilitate efficient operation of production system of the plant within the area of the site selected previously. Shop layout in manufacturing plant also forms an integral part of factory planning or plant layout. Plant layout begins with the design the position of the factory building and goes up to the location and movement of a work table of the machine. All the manufacturing facilities such as equipment’s, raw materials, machinery, tools, fixtures, workers, etc. are given a proper place in each shop of the manufacturing plant.

Plant layout of an industrial organization plays an important role in scientific management and is defined as : “Plant layout is such a systematic and efficient functional arrangement of various departments, machines, tools, equipment and other supports services of an industrial organization that will facilitate the smooth processing of the proposed or undertaken product in the most effective, most efficient and most economical manner in the minimum possible time”

Plant layout of an industrial organization comprises of all the aspects connected with the industrial enterprise, viz., grounds, buildings, machinery, equipment, departments, methods of manufacturing, factory services, material handling, flow of production, working conditions, hygiene, labor and shipment of goods, etc. It does not necessarily mean planning a new enterprise only. However, it also involves minor improvements, here and there, in the existing layout, expansion of the exiting plant, re-layout of the existing plant and layout of a new proposed plant. In a best possible plant layout, material handling and transportation is minimized and efficiently controlled. Bottlenecks and points of congestions are eliminated so that the raw material and semi-finished goods move fast from one work station to another. Work stations are designed suitably to facilitate the smooth processing of the proposed or undertaken product in the most effective, most efficient and most economical manner in the minimum possible time. Optimal spaces are allocated to production centers and service centers. The primary goal of plant layout is to maximize profits by setting up the best possible arrangements of all plant facilities to the maximum advantage of reducing the cost of production of the proposed product.

Objectives Of Good Plant Layout

Good plant layout comprises of best possible arrangement of the buildings, men, machine and materials for processing a under taken product. The main objectives of a good plant layout involves minimum material movement, smooth flow of the product in the plant, full utilization of the space of the plant, provide adequate safety and satisfaction to the plant workers, evolve sufficient flexibility in the arrangement of the above factors so as to suit the minor future changes, if any and facilitates an effective supervision. It helps to integrate all the above factors in such a way that the best compromise and coordination among them is achieved. The movements of workers and manufacturing staffs within the plant are minimized. Waiting time of the semi-finished and finished products should be reduced to the minimum. Working conditions as far as possible should be safer and better for the satisfaction of the workers. There should be an increased flexibility for changes in product design and for future expansion. There should be full utilization of whole space of the shop and plant layout. The work methods and reduced production cycle times should be improved and the plant maintenance must be simpler. There should be increased productivity and better product quality with reduced capital cost. A good layout facilitates materials to move through the plant at the desired speed with the minimum possible cost.

Important Factors For Installation Of A Plant

The important factors while planning for installation of plant include availability of space, power, water, raw material, good climatic conditions, good means of communication, ancillaries, low local taxes and similar other economic considerations, marketing facilities for the planned product, space for process disposal and skilled and unskilled labor locally. One has to keep in mind the possibilities of utilization and sale of the process wastes and by-products of the planned industry. Decision of manufacturing new product, financial and other aids, facilities for expansion presence of related industries, local by laws and securities, hospitality are also important factors which one must keep in mind for location of an enterprise. After finalizing the size and location of the plant, the next step is to design the inner layout of the plant to plan out the sequence of different shops and their locations accordingly to specifications of material and product, manufacturing processes, type of production, material handling facilities, system and facilities for storing, inter-dependability of one shop over the other, links among various shops, service facilities and lighting and ventilation. Next, the internal arrangement of the above mentioned infracturctral facilities of different shops are identified. This identification is termed as shop layout. The main factors namely size and type of equipment, number of machines to be installed, floor area required for working on each machine, power requirements for the machines, requirements of factory services, sequence of operations to be followed, visibility to all the machines for proper supervision and control, type of drive used, safe working conditions, provision of stores within the shop, i.e. for tools, instruments, finished parts and consumable materials, etc. affects the layout of the plant. A good plant layout should meet the following basic requirement:

1. Integration of manufacturing centre facilities in terms of man, machine and material.

2. Movements of production personnel and material handling should be minimized.

3. Smooth and continuous flow of production or manufacturing work with least possible bottlenecks and congestion points.

4. Floor space utilization should be optimum as for as possible.

5. Working place should be free from pollution and safe working conditions should prevail in each shop of the plant.

6. The handling of raw material, semi finished and finished product should be should be tackled optimally and effectively

7. Plant layout and shop layouts must be flexible to facilitate changes in production requirements

8. There should be better working environment in term of proper light, ventilation and other amenities such as drinking water and toilets for welfare for the manufacturing personnel.

Merits Of A Good Plant Layout

The main advantages of a good plant layout involve effectively and economical utilization of entire floor space of the plant, increased rate of production, reduced men and machine hours per unit of production, reduced material handling, minimal production delays, effective utilization of men, machinery, material and other factory support services, reduced overall production time, elimination of large amount of paper work, significant reduction in the indirect expenses, considerable reduction in inventory work for material, promote effective supervision, facilitate easy flow of men, tools and material, promote flexibility in arrangement to suit the future changes, promotes better planning and effective control, facilitates better and easier maintenance of plant and machinery, provides safer and healthier working conditions thereby improving the morale of the workmen, provides the material as well as psychological satisfaction to the workers and enhance overall efficiency of the plant. The major merits of a good plant layout are given as under:

1. Reduced men and machine hours per unit of production,

2. Effectively and economical utilization of entire floor space of the plant,

3. Work flow is smooth and continuous

4. Work in process inventory is less

5. Production control is better

6. Manufacturing time is less

7. Relatively less floor area is required

8. Material handling is less.