This page is for anyone who has confirmed a line's theoretical daily capacity (lesson 8.2.1) and now has to answer a harder question: how much of that theoretical figure does the line actually deliver. Efficiency percentage and capacity utilisation, already fixed as terms in Track 7, sound similar but measure two different things. It mainly teaches a decision: whether a manager can trust a theoretical figure on its own, or must apply efficiency first before quoting a real number.
This matters most to anyone confirming a single day's or a single order's output at a factory like Delta Garments, where a line's theoretical ceiling and its recorded efficiency can be far apart. Confirming a promise using theoretical capacity instead of efficiency-adjusted actual capacity overstates real output by exactly the efficiency gap.
Without this distinction, a person can promise more pieces than a line has ever actually produced in a day, and discover the shortfall only once the line is already running against the promise. This lesson gives you the method: theoretical capacity multiplied by efficiency percentage, kept separate from utilisation, which measures something else entirely.
You need: a line's theoretical daily capacity, calculated as in lesson 8.2.1. You do not need to have booked a line against real orders before.
By the end of this lesson you can:
Not covered here: calculating theoretical daily capacity itself (lesson 8.2.1), building a shared booking sheet across several lines and orders (lesson 8.2.3), and what happens when a line is booked beyond its actual capacity (lesson 8.2.4).
| Term | Meaning |
|---|---|
| Efficiency percentage | The share of a line's available minutes actually converted into standard output, separate from capacity utilisation, which instead measures how much of that output is booked to confirmed orders. |
| Capacity utilisation | The share of a factory's available capacity actually being used by confirmed orders, expressed as a percentage of its maximum output. |
| Theoretical daily capacity | The number of pieces a line could produce in a day if every available minute converted directly into output at the operation's SMV, before any efficiency loss is applied. |
| Standard minute value (SMV) | The standard time, in minutes, a trained operator needs to complete one operation on one piece, used to calculate a line's expected output and workload. |
| Make to Stock (MTS) | Producing against the seller's own sales forecast, rather than a single confirmed buyer order. |
Efficiency percentage is the share of a line's available minutes actually converted into standard output, so a line's actual daily capacity is its theoretical daily capacity multiplied by its efficiency percentage. Capacity utilisation is a separate measure of how much of that actual capacity is already booked to confirmed orders. A line can be highly efficient yet still have spare, unbooked capacity, or run at low efficiency yet already be fully booked; the two percentages answer different questions and neither one substitutes for the other.
Line 1's actual daily capacity, in pieces: theoretical daily capacity (lesson 8.2.1) multiplied by an illustrative 65% efficiency, rounding to about 1,498 pieces.
A person who has only compared a new line to an established one should not assume efficiency and utilisation always move together. They answer separate questions and can combine in any way.
| What can differ | The shapes you meet | Why it matters |
|---|---|---|
| A new line versus an established line | A line that has just started a new style typically runs at lower efficiency until operators learn the operations; an established line running a familiar style typically holds a steadier, higher efficiency. | The same theoretical capacity converts into very different actual capacity depending on how settled the line is. |
| Efficiency loss from absence or machine downtime | Operator absence or a stopped machine reduces a line's actual output below what its available minutes and SMV alone would suggest. | Efficiency captures this loss; theoretical capacity, calculated from minutes and SMV alone, does not. |
| High efficiency with low utilisation | A line can convert nearly all its available minutes into standard output while still having few or no confirmed orders booked against it, for example between two seasons for an export buyer like Northline Apparel. | A highly efficient line is not automatically a fully booked one; the two figures must be checked separately. |
| Domestic Make to Stock booking against efficiency, not one order | A domestic buyer like Cedar & Co., producing to its own sales forecast rather than one confirmed order, still needs the factory's efficiency-adjusted actual capacity to plan realistic stock delivery, with utilisation booked against forecast quantities rather than one buyer's purchase order. | Efficiency-adjusted actual capacity matters for planning whether the order is export or domestic; only what utilisation is checked against changes. |
Mona is asked by Sara whether Line 1 can produce 2,000 pieces in a single day for a rush addition to an order. Mona has Line 1's theoretical daily capacity of 2,304 pieces from the Line Daily Capacity sheet, but has not yet checked its recorded efficiency. Line 1 and Line 2's efficiency figures are illustrative teaching figures, since no line-level efficiency percentage is fixed in the master cast.
| Fact | What it tells Mona |
|---|---|
| Line 1's theoretical daily capacity, 2,304 pieces (lesson 8.2.1) | A ceiling, not yet checked against efficiency |
| Line 1's recorded efficiency, 65% (illustrative) | The share of that ceiling Line 1 actually converts into output |
| Sara's request, 2,000 pieces in a single day | The figure Mona must check against actual, not theoretical, capacity |
| What Mona has checked so far | Only the theoretical figure — not yet efficiency-adjusted actual capacity |
This example is illustrative, not a claimed fixed academy fact: Line 1's theoretical daily capacity from lesson 8.2.1 is 2,304 pieces; at an illustrative efficiency of 65%, actual daily capacity is 2,304 × 0.65 = 1,497.6, rounding to about 1,498 pieces. Line 2, with a different theoretical capacity of 50 operators × 480 minutes ÷ 12.5 SMV = 1,920 pieces, at an illustrative efficiency of 60%, gives an actual daily capacity of 1,920 × 0.60 = 1,152 pieces, showing that two lines with different theoretical capacities and different efficiencies do not simply scale together.
Line 2's actual daily capacity, in pieces: its own theoretical daily capacity multiplied by its own illustrative 60% efficiency.
A common mistake is quoting a delivery date using a line's theoretical daily capacity instead of its efficiency-adjusted actual capacity, which overstates real output by exactly the efficiency gap. A line assumed to make 2,304 pieces a day that actually makes about 1,498 pieces a day, illustrative at 65% efficiency, will fall behind schedule by roughly 806 pieces for every day booked at the theoretical figure.
A line's theoretical daily capacity is not what it really makes in a day. Efficiency percentage tells you how much of that theoretical figure the line actually converts into real output, so multiplying the two gives actual daily capacity, the real number to plan against. Utilisation is a different measure: it tells you how much of that actual capacity is already booked to confirmed orders. A line can convert almost all its time into output yet still have spare, unbooked capacity, or convert less of its time yet already be fully booked. Confirming a delivery promise on the theoretical figure instead of the efficiency-adjusted actual figure risks promising more than the line has ever really produced.
Mona is asked by Sara whether Line 1 can produce 2,000 pieces in a single day for a rush addition to an order. Mona has Line 1's theoretical daily capacity of 2,304 pieces from the Line Daily Capacity sheet, but has not yet checked its recorded efficiency.
Sara's message reads:
Should Mona confirm 2,000 pieces in a day to Sara using Line 1's theoretical daily capacity of 2,304 pieces?
No. Mona must apply Line 1's efficiency percentage before answering. Actual daily capacity is 2,304 × 0.65 ≈ 1,498 pieces, which is below the 2,000 pieces Sara is asking about.
First, theoretical capacity (2,304) is not the same as actual, efficiency-adjusted capacity (about 1,498). The 2,304-piece figure never accounted for efficiency loss in the first place.
Second, Sara's request of 2,000 pieces exceeds actual capacity even though it looked achievable against the theoretical figure. Confirming the theoretical number would promise a day's output the line cannot really deliver.
Mona should tell Sara that 2,000 pieces in a single day is not achievable at Line 1's current recorded efficiency, and discuss a lower daily figure or added overtime instead.
If Mona had confirmed 2,000 pieces using the theoretical figure, the day's actual shortfall would be about 502 pieces, 2,000 requested minus about 1,498 actually deliverable (illustrative).
The shortfall, in pieces, between what Sara requested and what Line 1 can actually deliver in a day at its recorded efficiency.
Against Order A's own FOB price of USD 3.20 per piece, used here only as a benchmark for scale, a shortfall of that size on one rush day represents roughly USD 1,606 of goods promised but not produced on time, a cost an efficiency check before confirming would have avoided.
This lesson uses the efficiency percentage and actual daily capacity columns of the "Line Daily Capacity" sheet, applying the efficiency figure to the theoretical capacity already entered in lesson 8.2.1. Enter each line's recorded efficiency percentage next to its theoretical figure, and read the actual daily capacity column the sheet calculates automatically, ready for lesson 8.2.3 to book against real orders. Download link: the course tool, `templates/T08-C02-capacity-booking-calculator.xlsx`.
1. What is the difference between efficiency percentage and capacity utilisation?
2. A line has a theoretical daily capacity of 1,920 pieces and an efficiency of 60%. What is its actual daily capacity?
3. Can a line be highly efficient but still have spare, unbooked capacity?
| EN | AR | FR | TR | Meaning |
|---|---|---|---|---|
| Efficiency percentage | نسبة الكفاءة | Pourcentage d'efficacité | Verimlilik yüzdesi | The share of a line's available minutes actually converted into standard output, separate from capacity utilisation, which instead measures how much of that output is booked to confirmed orders. |
| Capacity utilisation | معدل استغلال الطاقة الإنتاجية | Taux d'utilisation de la capacité | Kapasite kullanım oranı | The share of a factory's available capacity actually being used by confirmed orders, expressed as a percentage of its maximum output. |
| Theoretical daily capacity | الطاقة اليومية النظرية | Capacité journalière théorique | Teorik günlük kapasite | The number of pieces a line could produce in a day if every available minute converted directly into output at the operation's SMV, before any efficiency loss is applied. |
| Standard minute value (SMV) | قيمة الدقيقة المعيارية (SMV) | Valeur minute standard (SMV) | Standart dakika değeri (SMV) | The standard time, in minutes, a trained operator needs to complete one operation on one piece, used to calculate a line's expected output and workload. |
| Make to Stock (MTS) | إنتاج حسب المخزون | Fabrication sur stock | Stoğa üretim | Producing against the seller's own sales forecast, rather than a single confirmed buyer order. |
You now know how to turn theoretical capacity into a line's real, actual daily capacity. The next lesson takes that actual capacity and books it against real orders, across more than one line and more than one week at once. Back to the course map