CAPACITY DESIGN

Question One: Explain the determinants of effective capacity.

Capacity planning refers to determining what kind of labour and equipment capacities are required and
when they are required. Capacity is usually planned on the basis of labour or machine hours available
within the plant. Thus, capacity planning is planning for quantity or scale of output.

There are four major considerations in capacity planning:

 Level of demand
 Cost of production
 Availability of funds
 Management policy.

Production has no meaning unless its products can be sold at a remunerative price. Generally, the
capacity of plant is limited by the level of current demand. Stable demand makes the task of capacity
planning simple while fluctuations in demand create problems concerning the acquisition of resources
and matching them up with demand levels. Estimation of demand is, therefore, the first step in capacity
planning. Size of the market depends upon the sales potential rather than on the geographical areas.

Demand Forecasts

Demand forecasting is fundamental to effective capacity and sales planning. A demand forecast
establishes link between the internal management of the firm and its external environment. Before
making a demand forecast, the period of forecast should be decided and an appropriate method of
forecasting should be selected.

The nature of product to be sold, the size and characteristics of population, the disposable income,
degree of competition, fashion, trends, political conditions, import, export policy of Government, etc.,
should be taken into consideration. In case of multiple products, product line forecast is useful in
deciding the priority of different products in the allocation of limited resources. For example, Delhi
Cotton Mills Ltd., may like to know whether to produce more of sugar or textiles.

The demand for new product can be forecast by making consumer surveys, test marketing, product life
cycle analysis etc. The annual demand forecast is broken into monthly or weekly forecasts for
production scheduling.

Capacity planning is an integral part of the overall production planning for an enterprise. Capacity
planning and control is the process of establishing, measuring, monitoring and adjusting the levels of
capacity in order to execute all manufacturing plans and schedules in the best possible manner.
Capacity planning involves the following questions.

 What type of capacity is required?

 How much capacity is required?
 When the capacity is required?

The type of capacity required depends upon the products and services which the enterprise intends to
produce or provide. The quantity and timing of capacity is related to the quantity and timing of demand
for the product or service. The nature of demand (stable or fluctuating) is another important
consideration.

Capacity planning is an important element of production management. Decision concerning capacity are
one of the most basics decisions of production. Location, layout, and production technology can be
determined only after the capacity is decided. For example, Western Electronics Ltd., can decide the
number and type of machines, workers, materials and other inputs only after deciding the number of TV
sets to be manufactured by it.

Importance of Capacity Planning

Capacity planning is important due to the following reasons:

1. Capacity limits the rate of output. Therefore, capacity planning determines the ability of an enterprise
to meet future demand for its products and services.

2. Capacity influences the operating costs. Capacity is determined on the basis of estimated demand.
Actual demand is often different from estimated demand. As a result, there arises excess capacity or
under capacity. Excess or idle capacity increases the cost per unit of output. Whereas under capacity
results in the loss of sales.

3. Capacity decisions leave a direct impact on the amount of fixed investment made initially.

4. Capacity decisions result in long-term commitment of funds. Such long-term decisions cannot be
reversed except at major costs.

The following concepts of capacity are involved in capacity planning:

a. Design Capacity: It refers to the maximum output that can possibly be produced in a given period of
time. It is the ideal situation.

b. Effective Capacity: Refers to the maximum possible output, given the changes in product
mix, machine maintenance, scheduling and operating problems, labour problems, etc. It is usually less
than the design capacity.

c. Actual Output: It is the rate of output actually achieved. It cannot exceed effective capacity due to
machine breakdowns, labour absenteeism, irregular supply of raw materials, unusual delay in supply of
equipment, power breakdown, etc.
he effectiveness of a production system (system effectiveness) can be measured in two ways:

Efficiency which is the rate of actual output to effective output, and

Utilization which implies the rate of actual output to the design capacity.

Symbolically:

Efficiency = Actual Output /  Effective Capacity

Utilization = Actual Output  /  Design Capacity

Every operating manager should try to increase capacity utilization by increasing effective capacity.

Procedure for Capacity Planning

1. Assessment of Existing Capacity

Capacity of a unit can be measured in terms of output or inputs. Output measure is appropriate in case
of manufacturing concerns, e.g., automobile plant (number of cars), iron and steel plant (tons of steel),
brewery (barrels of bear), cannery (tons of food), power company, (megawatts of electricity), etc.
Service concerns like hospitals (number of beds), airlines (number of seats), theatres (number of seats),
restaurants (number of tables), university (number of students), warehouse (cubic feet of space), etc.,
can measure capacity in terms of inputs.

2. Forecasting Future Capacity Needs

Short term capacity requirements can be estimated by forecasting product demand at different stages
of the product life cycle. It is more difficult to anticipate long-term capacity requirements due
to uncertainties of market and technology. Capacity forecast helps to determine the gap between the
existing capacity and estimated capacity so that necessary adjustments may be made. For example, a
company engaged in manufacturing two products may find that one product has a low demand in
summer (e.g. coffee or tea) while another product has low demand in winter (e.g. cold drink).

3. Identifying Alternative ways of Modifying Capacity

In case where the existing capacity is inadequate to meet the forecast demand capacity, the expansion is
required to meet the shortage. Additional shifts may be employed to expand the capacity. Expansion will
provide economies of scale and help in meeting the forecast demand. But it involves additional
investment and danger of fall in forecast demand in future.

When the existing capacity exceeds forecast capacity, there is a need for reduction of excess capacity.
Developing new products, selling of existing facilities, layout of workers or getting work from other firms
are the methods of overcoming it.

4. Evaluation of Alternatives

Various alternatives for capacity expansion or reduction are evaluated from economic, technical and
other viewpoints. Reactions of employees and local community should also be considered. Cost Benefit
analysis, Decision theory and Queuing theory are the main techniques of evaluating alternatives.
5. Choice of Suitable Course of Action

After performing the cost-benefit analysis of various alternatives to expand or reduce the capacity, the
most appropriate alternative is selected.

Determinants of Effective Capacity

1. Facilities

The design of production facilities is the most important determinant of effective capacity. Design
includes the size and also the provision for expansion of the facilities. Design facilities should be such
that the employees should feel comfortable at their work place. Location factors such as distance from
the market, supply of labour, transport costs, energy sources are also important. Layout of the work
area determines how smoothly the work can be performed. Environmental factors such as lighting,
ventilation, etc., influence the effectiveness with which employees can perform the assigned work.

2. Products or Services

Design of the company’s products or services exerts a significant influence on capacity utilization. When
more uniform is the output, greater can be the standardization of materials and methods and greater
can be the utilization of capacity. For instance, a restaurant that offers a limited menu, can prepare and
serve meals at a faster rate. Product mix should also be considered because different products have
different rates of output.

3. Process

Quantity capacity of a process is the obvious determinant of effective capacity. But if quantity of output
does not meet the quality standards, the rate of output is reduced due to the need for inspection and
rework activities.

4. Human factors

Job design (tasks that comprise a job), nature of the job (variety of activities involved), training and
experience required to perform the job, employee motivation, manager’s leadership style, rate of
absenteeism and labour turnover are the main human factors influencing the rate of output.

5. Operational Factors

Materials management, scheduling, quality assurance, maintenance policies and equipment

breakdowns are important determinants of effective capacity. Late delivery and low acceptability of
materials will reduce effective capacity. Inventory problems are a major hurdle in a capacity utilization.
Similarly, when the alternative equipment has different capabilities there may be scheduling problems.

6. External Factors

Product standards (minimum quality and performance standards), pollution control regulations, safety
requirements and trade union attributes exercise tremendous influence on effective capacity. Generally,
the external factors act as constraints in capacity utilization.
Question Two: Write a brief not on steps in the capacity planning process

Any manufacturing facility benefits from the financial and logistical capabilities of capacity planning, no
matter the size of the business. This process ensures that you are creating production plans and
schedules that are feasible, given the available capacity and constraints of the system.

Mistakes made at this stage of production planning can be extremely costly. On one hand, having
insufficient capacity results in an inability to meet your delivery dates, unhappy customers, excess work-
in-progress inventory, and frustrated personnel that must deal with expedited orders on a constant
basis. On the other hand, having excess capacity means that you are not utilizing your production facility
to its full extent and losing money.

This is why capacity planning is essential for the success of your manufacturing facility.

What is Capacity Planning?

Capacity Planning is a method of management that features the efficient use of resources through a

projection of production needs. This type of planning can apply to a company’s computer network,
storage, workforce maintenance, and product manufacturing.

Planning for capacity breaks down into three steps: determining capacity requirements, analyzing
current capacity, and planning for the future. To gain a better grasp on how each applies to the planning
process, let us take a closer look at each one individually.

1. Determine Capacity Requirements

The first step of capacity planning is to determine how much capacity you need to meet demand.
Capacity requirements are dictated by the production plan, master production schedule, or detailed
materials plan. These demand signals will indicate how many items must be produced and this can be
used to determine how much capacity will be required to produce the items. 

In this step, businesses can organize the workload by identifying which resources are needed to
accomplish the work, and how much of each resource’s capacity will be used. In the next steps, this will
be compared to the available capacity of the production facility to determine whether it can successfully
meet the demand. 

2. Analyze Current Capacity

Businesses take an in-depth look at their current production schedule to evaluate capacity. They analyze
each workload and system as a whole, following these steps:

 Analyze the performance of resources by comparing predicted versus actual outputs.

 Check the usage of the various resources of the system.
 Take a look at the resource utilization for each job or item type and decipher which ones are the
major users of each resource.
  Determine where each workload spends its time. This provides insight into which resources take
the greatest portion of response time for each workload.
 Analyzing your current capacity is essential to have a realistic understanding of the capacity you
can utilize. This will allow you to generate accurate and feasible production plans and identify
potential areas of improvement. 

3. Plan for the Future

Finally, after analyzing your current capacity, it’s time to plan for the future. Creating a capacity plan for
the future will allow you to identify potential capacity bottlenecks to prevent overwhelming the
production system. The use of ‘What-If’ scenarios can be used to combine demand forecasts with actual
demand to create the most optimal production plan and schedule and have enough time to resolve
issues before they arise.

If your available capacity is consistently lower than the capacity required to meet your demand, you may
want to look at ways to increase your capacity to meet demand. Depending on the facility and capacity
requirement, this can include adding overtime, additional shifts, improving production processes, or
even investing in additional machines. 

These three steps in capacity planning help your organization prepare for future growth. An optimal
capacity configuration ensures you meet your promised delivery dates while only purchasing what you
need to get the work completed. Capacity planning facilitates your manufacturing processes’ well-being
and offers your company an opportunity to optimize its production process and ready itself for the
future.

Advanced Planning and Scheduling Software’s have become a must for modern-day manufacturing
operations as customer demand for increased product assortment, fast delivery, and downward cost
pressures become prevalent. These systems help planners save time while providing greater agility in
updating ever-changing priorities, production schedules, and inventory plans. APS Systems can be
quickly integrated with an ERP/MRP software to fill the gaps where these systems lack planning and
scheduling flexibility, accuracy, and efficiency.

With Planet Together APS you can:

 Create optimized schedules that balance production efficiency and delivery performance
 Maximize throughput on bottleneck resources to increase revenue
 Synchronize supply with demand to reduce inventories
 Provide company-wide visibility to resource capacity
 Enable scenario data-driven decision making
 References

Book: Production Process Design

Author: Rajiesh. M. Patne

Publication: Success Publication

Website:

https://accountlearning.com/notes-on-capacity-planning-importance-procedure-determinants/