What it means
Inside a company, manufacturing production covers everything from buying materials to completing goods ready for sale. The accounting system records the costs in three groups: direct materials, direct labour and manufacturing overhead, which is the indirect cost of running the factory, such as rent, power and supervision.
These costs flow into inventory and later into cost of goods sold when the products are sold. The key statement for a manufacturer is the cost of goods manufactured, which shows the total cost of products completed in a period.
It starts with the value of unfinished goods at the beginning, adds the costs incurred, and deducts unfinished goods at the end. Dividing the result by the number of units completed gives the average cost per unit.
At the national level, manufacturing production is an economic indicator. Statistical agencies publish an index of factory output, usually monthly, and analysts watch it for signs of economic momentum.
A sustained rise suggests growing demand and confidence, while a fall can be an early warning of slowdown. For managers, production figures drive decisions on capacity, pricing and hiring.
High utilisation spreads fixed overheads over more units and cuts unit costs, but overstretched plants face breakdowns and quality problems. Low utilisation does the opposite, leaving expensive capacity idle.
Finance teams also reconcile production records with the inventory accounts. Differences between standard and actual costs, known as variances, show where materials were wasted, labour was inefficient or prices changed.
Reviewing them each month helps catch problems before they reach the annual accounts. Output data can also be a guide to cash.
A factory that builds up finished goods faster than it sells them is converting cash into stock, so production reports should be read alongside sales and inventory figures.
In practice
Real-world examples.
Example
A bicycle maker tracks its monthly cost of goods manufactured, comparing actual costs with standard costs for each part. When steel prices rise, the rise shows up in direct materials, and management reviews its selling prices. It also asks purchasing to negotiate a longer supply contract.
Example
A government statistician publishes a factory output index that is up for the third month running. Investors read this as a sign that the economy is gaining momentum. Some analysts note that the figure may be revised later.
Example
A packaging company has idle capacity on its production lines. Its finance team calculates the overhead cost per unit at several output levels and uses the results to price a new contract. At higher output, the overhead per unit falls and a lower bid becomes affordable.
Formula
Calculation
Cost of goods manufactured = Beginning work in progress + Total manufacturing costs - Ending work in progress
Total manufacturing costs = Direct materials + Direct labour + Manufacturing overhead
A factory starts the month with $40,000 of work in progress. During the month it uses $200,000 of direct materials, $150,000 of direct labour and $100,000 of overhead, so total manufacturing costs are $200,000 + $150,000 + $100,000 = $450,000. Ending work in progress is $50,000, so cost of goods manufactured is $40,000 + $450,000 - $50,000 = $440,000. If 22,000 units were completed, the average cost per unit is $440,000 / 22,000 = $20.Case study
Seen in the real world.
Bayview Plastics is an illustrative, fictional manufacturer of storage containers. Its monthly accounts showed rising costs per unit, but management could not see why.
The finance team prepared a cost of goods manufactured statement and found that direct materials per unit had increased because of scrap, while overhead per unit had risen because a line was running below capacity. The two effects were hidden in the overall profit figure.
In this illustrative story, the company fixed the scrap problem and consolidated production onto fewer lines, which restored the unit cost to its earlier level. The example shows the value of breaking production costs down rather than looking only at total profit. Each cause needed a different fix, and neither would have been found by looking at the overall margin.
Watch out
Common mistakes.
- Confusing cost of goods manufactured with cost of goods sold, when the first measures what was made and the second measures what was sold.
- Leaving out overhead when valuing inventory, which understates the cost of the products made and overstates profit until the stock is sold.
- Reading one month of a national output index as a trend, when monthly figures can be volatile and are often revised.
Questions
People also ask.
What are the three main manufacturing costs?
Direct materials, direct labour and manufacturing overhead.
Why does production volume affect unit cost?
Fixed overheads, such as rent and supervision, are spread over more units when output rises, so the cost per unit falls, provided that the plant is not pushed past a sensible capacity.
How do economists use the term?
They track factory output through an index, as a signal of the health of the wider economy.
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