What it means
In a factory, the gap is usually measured against capacity or against the production plan, and the two versions answer different questions. If a plant can make 50,000 units a month but makes only 42,000, the difference of 8,000 units is the production gap.
The causes may be weak demand, supply problems, machine breakdowns, labour shortages or poor planning. Finding which one applies is the first step in deciding how to respond.
The gap matters financially because many costs, such as rent, supervision and depreciation, do not fall when output falls. These fixed costs are then spread over fewer units, which raises the cost of each unit and reduces profit.
In accounting, the unabsorbed part of fixed overhead caused by running below normal capacity is often written off as a cost for the period. It shows up as a volume variance, which tells managers how much money was lost through underuse of capacity.
Economists use a similar idea at national level, called the output gap, which compares actual output of the whole economy with its potential. A negative gap suggests spare capacity and weak demand, while a positive gap suggests overheating and inflation pressure.
Closing a gap can mean raising sales, cutting capacity, shifting production between sites or finding new uses for idle equipment. The right answer depends on whether the shortfall is temporary or permanent, and on how costly it would be to rebuild capacity later.
In practice
Real-world examples.
Example
A car parts supplier has orders for only 70% of its capacity after a customer shuts down a model line. The 30% gap leaves a large share of its fixed costs uncovered. It searches for new customers to fill the idle machines. Until it finds them, the finance team warns that margins will stay under pressure.
Example
A bakery's plan was to produce 10,000 loaves a day, but staff shortages limit it to 8,500. The gap of 1,500 loaves leads to lost sales. The owner raises wages to attract bakers and close the gap. She calculates that the extra pay costs less than the sales she is losing.
Example
A national statistics office estimates that an economy produces 3% less than its potential. The central bank takes this as a sign of weak demand. It keeps interest rates low to encourage spending. It will review the estimate as new data on output and employment arrive.
Formula
Calculation
Production gap = potential (or planned) output - actual output
Production gap % = production gap / potential output x 100
Suppose a plant has a capacity of 50,000 units a month and produced 42,000. Production gap = 50,000 - 42,000 = 8,000 units, which is 8,000 / 50,000 x 100 = 16%.
Fixed overhead is $2,000,000 a month, which is $40 per unit at full capacity (2,000,000 / 50,000). The overhead not absorbed by the 8,000 missing units is 8,000 x 40 = $320,000.Case study
Seen in the real world.
Stonebridge Appliances is an illustrative, fictional company with a factory that could make 100,000 washing machines a year. After a new competitor entered the market, orders fell and the plant made only 75,000.
The finance director calculated the gap as 25,000 machines, or 25%. Fixed factory costs were $12,000,000 a year, or $120 per machine at full capacity, so the unabsorbed cost was 25,000 x 120 = $3,000,000.
In this illustrative story management considered closing a production line. Instead, it won a contract to build components for another brand, which filled 10,000 machine slots, and cut the gap to 15,000 units and the unabsorbed cost to $1,800,000. The board noted that the contract work carried a lower margin than washing machines, but any contribution towards fixed cost was better than leaving the capacity idle.
Watch out
Common mistakes.
- Measuring the gap against maximum theoretical capacity that can never be reached, instead of a realistic level.
- Ignoring the fixed cost impact and looking only at the number of units missed, when the real damage is the overhead that was not recovered.
- Assuming the cause is always weak demand, when supply shortages, staff shortages and machine breakdowns may be responsible and need a different remedy.
Questions
People also ask.
Is a production gap the same as an output gap?
They are related, but production gap is usually applied to a business or plant, while output gap refers to the whole economy.
Is a production gap always bad?
Not necessarily, since a small gap gives flexibility to meet surges in demand and room for maintenance, but a persistent large gap is costly and may signal that capacity should be cut.
How do you reduce a production gap?
You can raise demand, cut capacity, find new customers or products for the idle equipment, or improve planning and supply, and the choice depends on whether the gap is expected to last.
From the founder's library
Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%Related