Defination of plant layout A method of organizing the element of production process in which similar process and functions are grouped together. A Plant layout is the physical arrangement of equipment and facilities within a plant. Plant layout is the organization of physical facilities like machinery, equipment & allocation of space for the various activities of the plant & personal working in the plant. Presentation title 3
Plant layout characteristics Provide space for machine/material/storage/etc. Flexible for futherAchive economy in operations corner. Accommodate future expansion Deals with government rules & regulations ( municipal corporation / labour law & rules Safety of employees /visitor / vendor in prime corner Archive economy in operation. Presentation title 4
Plant layout Presentation title 5 Layout is a fundamental of every organization and enterprise.
Kitchen, Retailers, offices, service organization and all the enterprises have a specific layout.
Previously layouts were based on intuition, experience and judgement.
With the complexities and competition now scientific methods are used.
The layout comes in picture after the location has been finalized.
Development of good layout depends on decision already taken on location, capacity, facility, manufacturing method and material handlin g techniques ..
Presentation title 6 ABC Company Layout
Factors to be considered in plant layout Presentation title 7 Factors to be considered in plant layout Building Men Machinery Materials Movement Services & changes Waiting time
Factors to be considered in plant layout 1. Building & structure:- Depend on type of production system (Intermittent / continuous) Intermittent system:- Building & Shades are constructed & layouts done in shades with best possible option & then machinery will be brought inside. Continuous system :- Arrange machine first then construction around. It should withstand & offer support to cranes / hoists /trolleys etc. 2. Men :- Number of people.
Unskilled (more space) / skilled ( less space i.e. Computer operator )
Physics of worker ( ex.height ). Presentation title 8
3) machinery Types of machine: General purpose machine:- compact in size & requires less space . Special purpose machine (SPM) : - large in size, complicated, high level of automation. Number of machine: Level of automation ( semi / fully automated)
Higher complexity wider space. Presentation title 9
4) Material Presentation title 10 Nature of material ( Flammable / inflammable / Hazardous & Non Hazardous , corrosive,methalene , mercury,oils,fuels )
Form of material ( Solid/ Liquid/Powder etc.).
Quantity of material to be handled. Cycle time: consumption of material.
5) Movement Movement of people / machine / cranes ( length & frequency)
Purpose of movement ( with load / without load / Quantity of load) Presentation title 11
6) WAITING TIME: Cycle time for completing each activity.
Intermittent:. Uncertain & high
More storage places between machines & facilities.
Continuous:-
Defined & low Presentation title 12
7) Services & changes Changes :- Production volume
Product type & design
Process type
Varieties
Frequency of change ( Ex 5 years) Services :- Electrical supply
Pneumatic supply ( Air supply)
Water supply
Chilling process – cooling tower
Air ventilation-Ducting
Fire extinguisher- water sprinkler Presentation title 13
Types of plant layout Functional layout ( process layout)
Line layout ( product layout) Static product layout ( Fixed position) Group layout ( Cellular layout) Combination layout ( Hybrid layout)
1) Functional layout ( process layout) Presentation title 15 Also called process layout.
Its best suited for intermittent types of operation.
Machines on layout are called as general purpose machines.
It involves a grouping of like machines in one section / dept. EXAMPLES :-
Machines performing grinding operation are installed in grinding dept.
Machines performing drilling operations are installed in drilling dept.
Heat Treatment / painting etc.
Advantages & Disadvantages Advantages Easy to handle machine breakdown by transfer of to another machine.
Greater scope for expansion.
Investment on equipment will be comparatively low.
Full utilization of equipment. Disadvantages Requires more floor space.
Difficulty in movement of material.
Production control is difficult.
High production time as material has to travel from place to place. Presentation title 16
2) Line layout ( product layout) Presentation title 17 It involves the arrangement of machines in one line, depending on operation sequence. Raw material will be fed in first machine & final product will come out of last machine.
Output of one machine becomes input to next machine. Example :-
Sugar refineries / paper mills / cement plants / Rolling mills.
Advantages & Disadvantages Advantages Smooth & regular flow of finished goods.
Shorter processing time due to less travel , storage & inspection frequency.
Reduced material handling.
Low cost labors & lesser training requirements.
Use of special purpose machine (SPM), automatic or semi automatic.
Easy production control. Disadvantages Heavy capital investment.
Non flexible layout.
Risk of total production line shutdown. Presentation title 18
3) Static product layout ( fixed position ) This type of layout involves the movement of men & machines to the product which remains stationary. Presentation title 19
Advantages & Disadvantages Advantages The investment on layout is very small.
The high cost & difficulty in transporting a bulky product are avoided. Disadvantages High cost of operation.
Very high duration of project.
Rework will be very costly. Presentation title 20
4) Group layout ( cellular layout) Presentation title 21 In cellular manufacturing layout the arrangement of facility so that equipment used to make similar parts of families of parts is grouped together. The group of equipment is called “ cell” The arrangement of cells is called a “ cellular layout”
Cellular layout Presentation title 22
5) Combination layout ( Hybrid layout) It is a combination of product & process layout with an emphasis on either.
In Industries plant are never laid out in either pure form.
It is possible to have both types of layouts in an efficient combine form if the products are somewhat similar & not complex.
Fabrication -----Process layout
Assembly of parts -------Product layout
Ex : soap manufacturing machines-----product line
Process layout----Functional basis----Ancillary services----
Heating / Manu of glycerin / power house / water treatment plant. Presentation title 23
Factors influencing layout Presentation title 25 Factory Building: The nature & size of building the floor determines the floor space available for layout. While designing the special requirements i.e. Air conditioning , dust control, Humidity control, Noise proofing etc. must be kept in mind.
2) Nature of the product: product layout is suitable for uniform products. Process layout is suitable for custom made products.
3) Production process:- In assembly line Industries product layout is better. In job order or intermittent manufacturing process layout is desirable.
4) Types of machinery :
General purpose machines are arranged as per process layout, special purpose machines are arranged as per product layout.
5) Repairs & maintenance: Machines/ Equipment must be arranged keeping in mind the movement of operators & maintenance tools.
6) Human Needs: Adequate arrangement should be made for wash rooms, drinking water / Canteen & other employee facilities.
7) Plant Environment :-
Heat / Noise / Light / Ventilation & other aspects should be duly considered e.g. Paint shop / Fabrication / Plating section should be located separately to product employees from harmful fumes etc. Adequate safety arrangement should be made.
Symptoms of poor Layout A good layout results in Comfort,
Convenience,
Safety,
Efficiency,
Compactness,
Finally in profits to the organization A poor layout results in Congestion,
Wastes,
Frustration,
Inefficiency and
Finally lower profit or loss to an organization Presentation title 26
Plant layout tools & techniques 1) Process chart
Operations process chart
Flow process chart
2).Process Flow Diagrams
3) Machine Data cards
4) Visualization of layout
Two dimensional plan or template
Three dimensional plan or machine models Presentation title 27