UEP and throughput accounting embody opposite philosophies of product costing, which makes the comparison unusually clean. The UEP method (unidade de esforço de produção, the production effort unit) is an allocation method: it spreads transformation effort across products to give each a per-product effort cost. Throughput accounting, born from Eliyahu Goldratt's Theory of Constraints, is an anti-allocation method: it argues that allocating overhead to products produces wrong decisions, so it simply refuses to do it. One divides effort up; the other declines to divide at all. This page sets the two against each other and shows when each way of thinking is the right one.
UEP and throughput accounting sit at opposite ends of the allocation argument. UEP is fundamentally an allocation method: it spreads transformation effort across products through one abstract effort unit, giving each product a per-product effort cost, which makes it strong for multi-product productivity and output comparison. Throughput accounting, from Goldratt's Theory of Constraints, is fundamentally an anti-allocation method: it uses three measures, Throughput (sales minus totally variable costs, usually just raw materials), Investment or Inventory, and Operating Expense, refuses to allocate overhead to products, and manages by the bottleneck. Its product-mix decisions rank options by throughput per unit of the constraint, not by absorbed cost. Choose UEP for a stable per-product effort measure in a multi-product plant with no single dominating bottleneck; choose throughput accounting when one constraint gates the system and you make frequent short-run mix and pricing calls. Neither values inventory for the statutory accounts. ---
The core difference
The spine of this comparison is allocation. The two methods disagree about whether you should allocate overhead to products at all.
UEP
UEP allocates. It builds an abstract unit, the UEP, that captures how much transformation effort a product demands as it passes through the plant's work centres, and it then spreads transformation effort across products through that unit to give each one a per-product effort cost. The aim is a stable, comparable measure of how much effort each product consumes and how productive the plant is across a varied product range. Allocation is the whole point: UEP exists to divide effort fairly across heterogeneous output.
throughput accounting
Throughput accounting refuses to allocate. From Eliyahu Goldratt's Theory of Constraints, first popularised in his 1984 novel The Goal, it works with three measures: Throughput (T), defined as sales minus totally variable costs, where the totally variable cost is usually just raw materials; Investment or Inventory (I); and Operating Expense (OE). Crucially it does not allocate overhead to products at all. Goldratt argued that allocating overhead to individual products leads managers to wrong decisions, so the method declines to do it and instead optimises the system's constraint. Product-mix choices are made on throughput per unit of the bottleneck, never on an absorbed cost per product.
Side by side
| Dimension | UEP | Throughput accounting |
|---|---|---|
| Philosophy | Allocate transformation effort across products | Refuse to allocate overhead to products |
| Origin | France (Perrin's GP method), developed in Brazil | Goldratt's Theory of Constraints, The Goal, 1984 |
| Core measures | One abstract effort unit (the UEP) | Throughput (T), Investment or Inventory (I), Operating Expense (OE) |
| Totally variable cost | Not the organising idea | T = sales minus TVC, TVC usually just raw materials |
| Decision lens | Per-product effort and productivity | Throughput per unit of the constraint |
| Manages by | Work centres and output mix | The bottleneck or constraint |
| Best when | No single dominating bottleneck | One constraint gates the whole system |
| Statutory inventory role | None | None (values inventory at TVC only) |
A worked contrast
Take an illustrative multi-product plant, CaP Manufacturing (figures illustrative). Suppose a single machining cell is the bottleneck for the whole plant. Throughput accounting would rank the products by throughput per bottleneck-minute: Product A at, say, EUR 4.00 per minute against Product B at EUR 2.80 per minute (illustrative). On that basis it prioritises Product A on the constrained machine, because every minute of the bottleneck spent on A earns more throughput than a minute spent on B. The decision is made entirely on the constraint, with no overhead allocated to either product.
UEP starts from a different question. Rather than ranking products by their pull on one bottleneck, it would express both products in UEPs, so the plant can compare their total transformation effort and judge overall productivity across the whole range. That is useful when there is no single dominating bottleneck and the management question is "how productive are we across all this varied output", but it is not the tool for a snap mix call on a constrained machine. Note that both methods are internal tools: neither values inventory for the statutory accounts, and throughput accounting in particular values inventory at totally variable cost only, which is well below what absorption costing would record.
When to choose which
Reach for UEP when you need a stable per-product effort measure for productivity and mix in a multi-product plant where no single bottleneck dominates the whole system. UEP gives you one comparable scale across very different products, which is exactly what you want when the management question is about overall output and productivity rather than squeezing one constrained resource.
Reach for throughput accounting when one bottleneck gates the whole system and you make frequent short-run mix and pricing calls. When the constraint is clear and decisions turn on getting the most out of it, ranking by throughput per unit of the constraint is sharper and faster than any allocated cost, and it avoids the wrong decisions Goldratt warned that allocation can cause.
The deeper point is that these two are not a spectrum but a fork. UEP believes in allocating effort across products and builds a careful unit to do it well; throughput accounting believes allocation misleads and refuses it on principle. Knowing which belief fits your plant, broad multi-product productivity or a single dominating constraint, is most of the choice.
Frequently asked questions
What is the fundamental difference between UEP and throughput accounting?
Allocation. UEP allocates transformation effort across products to give each a per-product effort cost; throughput accounting refuses to allocate overhead to products at all and manages by the constraint instead. They embody opposite philosophies of product costing.
What are the three measures in throughput accounting?
Throughput (T), defined as sales minus totally variable costs, where the totally variable cost is usually just raw materials; Investment or Inventory (I); and Operating Expense (OE). Decisions are driven by throughput relative to the constraint, not by allocated cost.
Why does throughput accounting refuse to allocate overhead?
Goldratt argued that allocating overhead to individual products leads managers to wrong decisions, so the method declines to do it. Instead it optimises the system's bottleneck and ranks product mix by throughput per unit of the constraint.
Does either method value inventory for the statutory accounts?
No. Both are internal tools. UEP costs only transformation, and throughput accounting values inventory at totally variable cost only, which is below what absorption costing records. For statutory inventory valuation you need absorption costing, not these methods.
When should I use UEP rather than throughput accounting?
Use UEP when you run a multi-product plant with no single dominating bottleneck and you want a stable, comparable measure of per-product effort and overall productivity. Use throughput accounting when one constraint gates the whole system and you make frequent short-run mix and pricing calls.
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