Ms To
Ms To
• Nearness to supply of raw materials: As far as possible the site        The processing units are organized by functions into departments
selected should be near the source of raw materials, so that the          on the assumption that certain skills and facilities are available in
cost of transportation can be minimized and storing cost can be           each department similar equipment and operations are grouped
reduced due to shorter lead time.                                         together, e.g., milling, foundry, drilling, plating, heat treatment
                                                                          etc. The use of process-focused systems is very wide in both
• Availability of labor: Availability of right kind of labor force in     manufacture and other service facilities such as hospitals, large
required number at reasonable rates is also a deciding factor in          offices, municipal services, etc.
selection of site.
                                                                          3.Cellular or group layout: It is special type of functional layout in
• Transport and communication facilities: Generally, industries           which the facilities are club bed together into cells.
have a tendency to locate the industrial units near the railway
station, highway or port areas.                                           This is suitable for system designed to use the concepts, principles
                                                                          and approaches of group technology‘. Such a layout offers the
• Availability of power and fuel: Coal, electricity, oil and natural      advantages of mass production with high degree of automation
gas are the important sources of power in the industries. Ex: Tata        even if the numbers of products are more with flexible
iron and steel industry is established near the coal mines of Bihar.      requirement. In such a system the facilities are group into cells
                                                                          which are able to perform similar type of functions for a group of
• Climatic conditions: Climatic conditions largely affect certain         products.
production processes and also the efficiency of the employees. Ex:
Textile mills require moist climate that why these plant located at       4.Job Shop Layout: It is a layout for a very general flexible system
Mumbai and Ahmedabad.                                                     that is processing job production, The preparation of such a layout
                                                                          is dependent on the analysis of the possible populations of orders
                                                                          and is a relatively, complex affair
• Availability of water: Water is used in industries for processing
as in paper in chemical industries, for generation of power in            5. Projector Fixed position Layout: This is the layout for project
hydroelectric power, plants and also required for drinking sanitary       type systems in which the major component is kept at a fixed
purpose also.                                                             position and all other materials, components, tools machines,
                                                                          work etc. are brought and assembly or fabrication is carried out.
• Ancillary industries: Many industries such as processing and
assembly industries are not producing all the parts of their              This type of layout is now not used very commonly as the
product but purchase some of the parts from ancillary industries          machines required for manufacturing work are big and
producing it.                                                             complicated. The fixed position layout is used only when it is
                                                                          difficult to move the major component and fabrication is to be
                                                                          carried out. Ex: production of ships
Financial and other aids: For the development of backward
regions central as well as state government provide certain               Principles of Plant Lay-out
incentives and facilities such as cash subsides, concession financial
assistance, land, power and other facilities at cheaper rates, tax        1. Principle of Integration
concession etc.
                                                                          As a company grows, so too does its need for more systems and
                                                                          applications each one playing a crucial function in its operations.
                                                                          For example, you might have customer relationship management
                                                                          (CRM) software to administer customer data, an accounting
                                                                          system to handle invoices, and an HR system to manage
employees. But problems can occur if those systems aren’t
integrated. Teams may work or make key decisions based on
outdated data.                                                         One downside to batch manufacturing is processing costs can
                                                                       increase because the process is slower than continuous flow.
So how can you ensure that everyone has access to the most up-         Manufacturing processes that use certain materials like titanium
to-date information? And how can you integrate your systems to         require the batch manufacturing approach. The continuous flow
ensure everything works together?                                      process increases productivity due to manufacturing more
                                                                       products in less time. Batch manufacturing allows you to develop
                                                                       multiple products using one machine
Business process integration (BPI) allows companies to connect         The continuous flow process is a technique where products are
their people, data, and applications. With BPI, organizations can      manufactured nonstop using one method at one facility without
better coordinate both internally and with partners, customers,        break times. During the continuous flow process for a
and vendors to achieve better results. Processes become more           pharmaceutical tablet production line, tablets move through the
complex as a company scales its operations.                            manufacturing process individually. Then, manufacturing experts
                                                                       identify and correct tablet defects and other manufacturing
For example, managing purchase orders is easy enough for one           problems early on in the process.
vendor. But as you work with more vendors, you might add
software to manage this process. Then you might add software to        Batch Manufacturing
keep track of inventory, another to pay invoices, and another to
manage your accounts. Before long, a single process can end up         Batch manufacturing in pharmaceutical tablet production lines
encompassing multiple technologies, which can affect                   involves developing tablets in groups using multiple steps. During
productivity and impede your automation efforts because the            batch manufacturing, subsequent tablet batches must wait until
data is isolated from each other. 39% of I.T. and engineering          the current batch is complete before production can move
leaders say that integrations and fetching external data are some      forward. Then, the entire tablet batch goes to the final
of the biggest challenges they face in implementing process            manufacturing stage together. In some batch manufacturing
automation.                                                            facilities, materials are shipped to another location between
                                                                       steps, resulting in weeks or months between production times.
Using the continuous flow process also creates a work                 Companies who successfully integrate the principles of Lean
environment where your employees can get in the zone and              Manufacturing understand that when each of these seven types
focus, allowing them to accomplish manufacturing goals more           of flows are working in harmony, they are increasing their odds of
efficiently. There are minimal work-stopping problems with            producing finished goods and services that require little to no
continuous flow because your team members don’t have to stall         corrective action. Keeping production running, in such a smooth
or wait around for the next completed batch. Problem-solving is       fashion, also helps to ensure that a company is creating
also more seamless with the continuous flow process. Your             efficiencies.
employees can locate minor manufacturing issues before they
become costly problems that affect your bottom line.                  Barriers to Flow
3.Principle of Smooth Flow                                            If you want to improve flow, first remove all barriers. Figliolino
                                                                      Venanzio, Founder of Lean Six Sigma University, outlines both
It states that bottlenecks, congestion points and bulk tracking       physical and intangible barriers to flow:
should be removed by proper line balancing techniques                 Examples of Physical Barriers to Flow:
.                                                                     ▪ Distance: Rather than transporting individual items, they are
“Originally developed as a methodology to make production             collected and shipped as a group
processes highly efficient, lean techniques have been adopted by      ▪ Long Setup Times: When changing over tooling takes a long
more than 72 percent of machine shops across the country. For         time, larger batches are run
many of these, the techniques have helped them to dramatically        ▪ Batch-Oriented Machines: Some machines are designed to be
increase their competitive edge, while continuing to remove           most efficient with large runs.
wasteful practices and contribute to the bottom line.”                ▪ Poor Maintenance: Machines that break down frequently
                                                                      disrupt flow.
Lean techniques are not limited to machine shops, productions
plants, or manufacturing companies. They can help any business
motivated to produce products and deliver services using as few       Examples of Intangible Barriers to Flow:
resources as possible, while eliminating as much waste as
possible. No matter the type of business, whether a restaurant,       • Unreliable Deliveries: When there is no trust that parts will
bakery, , small offices, or large processing plants all follow the    arrive on time, extras are kept on hand
same five Principles of Lean from the Toyota Production System.       •Unreliable Quality: If people think that many parts will be
                                                                      unsuitable or will require rework, extras will be kept on hand
These principles are:                                                 • Approval Processes: The approver is seldom standing by, so
• Understand value from the customer perspective                      work is piled up until the next opportunity to get the go-ahead
• Understand the Value Stream                                         • Lack of Faith: Some people just don’t believe flow is possible, so
• Make the Value Stream Flow                                          don’t even try
• Create Pull                                                         • Resistance to Change: Some people think flow might work, but
                                                                      like things to stay the same.
                                                                      Once companies identify and prioritize all of the barriers to flow,
Continuously Improve each of these concepts is related to the         they are ready to implement the changes designed to improve the
others. The focus of this blog is on flow, and the seven flows of     overall process of flow.
manufacturing, barriers to flow in organizations, and how to
improve flow.
                                                                      Improving Flow
Flow is how work progresses through a system. When a system is
working well, or having “good” flow, it tends to move steadily and    Lee Candy, creator of Educational Business Articles, suggests 6
predictably, whereas, “bad” flow means the work starts and            pointers to help companies develop flow within their processes:
stops. Every time there is a breakdown in the flow, chances of
accumulating waste increase. One goal is to strive for a consistent   ✔ Map the process
flow which generates more reliable delivery, and greater value to     ✔ Identify and log all problems process owners experience
customers, teams, and stakeholders.
                                                                      ✔ Identify all waste in the current process
                                                                      ✔ Map an ideal state – the perfect process achieved in absence of
                                                                      all constraints
                                                                      ✔ Develop an action plan
Identifying the Seven Flows of Manufacturing
                                                                      ✔ Actively monitor the new processes put into place by creating
Mike Wroblewski, Senior Operations Consultant for Gemba               performance measures
Consulting, explains in his reliable Plant blog, the Seven Flows of
Manufacturing by his Japanese sensei, Nakao-san:
                                                                      4.Principle of cubic space: Space of a room, it the ceiling height is
     1.    The flow of raw material                                   also utilized, more materials can be accommodated in the same
     2.    The flow of work-in-process                                space.
     3.    The flow of finished goods
     4.    The flow of operators
     5.    The flow of machines
     6.    The flow of information                                    The concept of plant layout may be described as follows:
Plant layout is a plan for effective utilization of facilities for the        (v)         Principle of Overall Integration: All the plant
manufacture of products; involving a most efficient and                                   facilities and services should be fully integrated
economical arrangement of machines, materials, personnel,                                 into a single operating unit; to minimize cost of
storage space and all supporting services, within available floor                         production.
space.                                                                        (vi)        Principle of Safety: There should be in-built
                                                                                          provision in the design of layout, to provide for
“Plant layout is a plan of optimum arrangement of facilities                              comfort and safety of workers.
including personnel, equipment’s, storage space, material
handling equipment and all other supporting services along with
the decision of best structure to contain all these facilities.”
                                                                              (iii)       Principle of Interdependence: Interdependent
Certain useful observations on the concept of plant layout are as                         operations and processes should be located in
follows:                                                                                  close proximity to each other; to minimize
                                                                                          product travel.
      (i)         Plant layout is very complex in nature; because it          (vii)       Principle of Smooth Flow: The layout should be
                  involves concepts relating to such fields as                            so designed as to reduce work bottlenecks and
                  engineering, architecture, economics and                                facilitate uninterrupted flow of work throughout
                  business management.                                                    the plant.
      (ii)        Most of managers now realize that after the site            (viii)      Principle of Economy: The layout should aim at
                  for plant location is selected; it is better to                         effecting economy in terms of investment in fixed
                  develop the layout and build the building around                        assets.
                  it – rather than to construct the building first and        (ix)        Principle of Supervision: A good layout should
                  then try to fit the layout into it.                                     facilitate effective supervision over workers.
                                                                              (x)         Principle of Satisfaction: A good layout should
(x) Hold down investment (i.e. keep investment at a lower level) in                       facilitate effective supervision over workers.
equipment.                                                                    (xi)        Principle of Satisfaction: A good layout should
                                                                                          boost up employee morale, by providing them
                                                                                          with maximum work satisfaction.
      (i)         Streamline flow of materials through the plant         A technique of locating machines, processes and plant services.
      (ii)        Minimize material handling                             Within the factory order to secure the greatest possible output of
      (iii)       Facilitate manufacturing progress by maintaining       high quality at the lowest possible total cost of production.
                  balance in the processes
      (iv)        Maintain flexibility of arrangements and of
                  operation
      (v)         Maintaining high turnover of in-process inventory      Types of Plant Layout:
      (vi)        Effective utilization of men, equipment and space
      (vii)       Increase employee morale                               Two basic plans of the arrangement of manufacturing facilities are
      (viii)      Minimize interference (i.e. interruption) from         – product layout and process layout. The only other alternative is
                  machine                                                a combination of product and process layouts, in the same plant.
      (ix)        Reduce hazards affecting employees
                                                                         1.Production line layout: This type of layout is developed for
Principles of Plant Layout:                                              product-focused systems. In this type of layout only one product,
                                                                         or one type of product, is producing a given area case of product
While designing the plant layout, the following principles must be       being assembled, this type of layout is popularly known as an
kept in view:                                                            assembly line layout.
      (i)         Principle of Minimum Movement: Materials and           The work centers are organized in the sequence of appearance.
                  labor should be moved over minimum distances;          The raw material treat one end of the line and goes from one
                  saving cost and time of transportation and             operation to another rapidly with minimum of work-in-process
                  material handling.                                     storage and material handling.
      (ii)        Principle of Space Utilization: All available cubic
                  space should be effectively utilized – both
                  horizontally and vertically.
      (iii)       Principle of Flexibility: Layout should be flexible    Following is an account of the various types of plant layout:
                  enough to be adaptable to changes required by
                  expansion or technological development.                In this type of layout, all the machines are arranged in the
                                                                         sequence, as required to produce a specific product. It is called
                                                                         line layout because machines are arrange in a straight line. The
                                                                         raw materials are fed at one end and taken out as finished
      (iv)        Principle of Interdependence: Interdependent           product to the other end.
                  operations and processes should be located in
                  close proximity to each other; to minimize             2.Process or Functional layout: This type of layout is developed or
                  product travel.                                        process focused systems. The processing units are organized by
functions into departments on the assumption that certain skills         Product layout is suitable in the following cases:
and facilities are available in each department similar equipment
and operations are grouped together ,e.g., Milling, foundry,                  1.    Where one or few standardized products are
drilling, plating, heat treatment etc. The use of process-focused                   manufactured.
systems is very wide in both manufacture and other service                    2.    Where a large volume of production of each item has
facilities such as hospitals, large offices, municipal services, etc.               to travel the production process, over a considerable
                                                                                    period of time.
3.Cellular or group layout: It is special type of functional layout in        3.    Where time and motion studies can be done to
which the facilities are clubbed together into cells. This is suitable              determine the rate of work.
for systems designed to use the concepts, principles and                      4.    Where a possibility of a good balance of labor and
approaches of group technology‘. Such a layout offers the                           equipment exists.
advantages of mass production with high degree of automation                  5.    Where minimum of inspection is required, during
even if the numbers of products are more with flexible                              sequence of operations.
requirement. In such a system the facilities are group into cells             6.    Where materials and products permit bulk or
which are able to perform similar type of functions for a group of                  continuous handling by mechanical parts.
products.                                                                     7.    Where minimum of set-ups are required.
Process layout is used to produce various operations like                      1.    While comparing with mass production it requires less
stamping, welding, heat treatment being carried out in different                     capital
work center’s as per requirement. The final assembly of the                    2.    Comparing with job production, it is more
product is done in a product type layout.                                            advantageous commercially.
                                                                               3.    If demand for one product decrease then production,
                                                                                     for another product may be increased, thus the risk of
                                                                                     loss is very less.
Fixed Position Layout:
                                                                          Disadvantages:
It is also called stationary layout. In this type of layout men,
materials and machines are brought to a product that remains in                1.    Comparing with mass production cost of scales and
one place owing to its size. Ship-building, air-craft manufacturing,                 advertisement per unit is more.
wagon building, heavy construction of dams, bridges, buildings                 2.    Raw materials to be purchased are in less quantity
etc. are typical examples of such layout.                                            than that in mass production; therefore it is slightly
                                                                                     costlier than that of mass production because less
                                                                                     quantity discount is available.
Advantages:
Work Study: Work study is one of the most important                    It classified into three types:
management techniques which is employed to improve the
activities in the production. The main objective of work study is to   • Man Type : It records what the worker does.
assist the management in the optimum use of the human and              • Materials Type : It records what happens to the materials.
material resources.                                                    • Equipment Type : It records how the equipment used.
Definition: Work study refers to the method study and work             3.Two handed process chart: The two hand process chart is a
measurement, which are used to examine human work in all its           chart is which the activities of a workers hand are recorded, in
contexts by systematically investigating into all factors affecting    their relationship to one another. It is commonly used for
its efficiency and economy to bring forth the desired                  repetitive and short operations
Improvement.
                                                                       4.Multiple activity chart: A multiple activity chart is a chart in
Method Study: Definition: The systematic recording and critical        which the activities of more than one item (worker, machine or
examination of existing and proposed ways of doing work, as a          equipment) are recorded on a common time scale to show their
means of developing and applying easier and more effective             inter relationship. By using separate vertical columns to represent
methods and reducing cost it is also called motion study.              the activities of different operators or machines on a common
                                                                       time scale, the chart shows very clearly the period of idleness on
Work Measurement: Definition: Work measurement is the                  the part of any items during the process
application of techniques designed to establish time for a
qualified worker to carry out a specified job at a defined level of
performance.
                                                                       Work study is one of the most important management techniques
Work study has two parts, Method Study and Work Measurement.           which is employed to improve the activities in the production. The
                                                                       main objective of work study is to assist the management in the
Method study deals with the techniques of analyzing the way to         optimum use of the human and material resources
do a given job better, Work Measurement seeks to measure the
time required to perform the job.                                      Definition: Work study refers to the method study and work
                                                                       measurement, which are used to examine human work in all its
                                                                       contexts by systematically. Investigating in to all factors affecting
                                                                       its efficiency and economy to bring for the desired improvement.
Basic procedure for Method Study:
                                                                       Work Measurement: Work measurement is the application of
Select: The work to be studied Record: All the relevant facts of the   technique to establish the time for a qualified worker to carry out
present or proposed method study by observation                        a specified job at a defined level of performance.
Examine: The recorded facts critically every thing that is done,
considering in turn, the purpose of the activity, the place where it   Procedure for Work Measurement:
is performed, the sequence in which it is done, the person who is
doing it and the means by which it is done.                            1.Sect: The work to be studied and determine the objectives of
Develop: The most practical, economical and effective method           the study.
considering all the circumstances.                                     2.Record: All the relevant data relating to circumstances in which
Define: The new method so that it can always be identified.            the work is being done, the methods to be used breakdown the
Install: The method as standard practice                               job into its elements
Maintain: That standard practice by regular routine checks.            3.Examine: The recorded data and the detailed breakdown
Recording: The current process of doing the job has to be              critically to ensure the most effective method and motions are
recorded, while doing so every detail however small it may be,         being used and that unproductive elements are separated from
has to be identified. Where the process is too long, involving         productive elements.
many stages of production, inspection or transportation, the           4.Measure: The time required to complete each element using
                                                                       the appropriate work measurement techniques and calculate the
time required to compete the work cycle which is known as basic
time.
5.Compile: The standard time for the operation or work place, in
case of stop watch time study the various allowances to cover
relation personal needs etc. are added to the basic time to
estimate the standard time.