# Why Garment Factories Plan at 60–80% Efficiency — Never 100%

> Garment factories deliberately plan production at 60–80% efficiency, not 100%. Why: SMVs assume uninterrupted standard conditions that real floors never have. The verified benchmarks, what eats the missing 20–40%, and how to raise your planning number.

**Source:** [https://scanerp.pro/blog/why-factories-plan-60-80-percent-efficiency.html](https://scanerp.pro/blog/why-factories-plan-60-80-percent-efficiency.html)

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# Why Garment Factories Plan at 60–80% Efficiency — Never 100%



        S
        Santosh Rijal

      ·
      July 2, 2026
      ·
      9 min read
      Garment Industry



      TL;DR — Direct Answer:
      Garment factories deliberately plan production at 60–80% efficiency because SMV-based capacity assumes uninterrupted standard conditions that no real floor sustains: style changeovers reset learning curves, lines are never perfectly balanced, machines break, workers are absent, and bundles wait. Most South Asian factories actually run at 50–60%. The planning number isn't pessimism — it's honesty. The mistake isn't planning at 70%; it's not *measuring* why you're losing the other 30%.



Here's a question that confuses every factory owner the first time they build a capacity plan: if the SMV says a polo takes 12 minutes, and I have 30 operators working 8 hours, why does my production planner refuse to promise 30 × 480 ÷ 12 = 1,200 polos a day — and write 840 instead?


The planner is applying a **planned efficiency** of 70%. And they're right to. This article explains where that discount comes from, what the verified benchmarks say, and — the part that actually matters for your profit — how factories move the number up.


## The SMV Is a Laboratory Number


A Standard Minute Value describes a qualified operator, working at standard pace, on a running machine, with the bundle already at her side, doing an operation she knows — with allowances already included for fatigue and personal needs. (Full derivation in our [SAM/SMV calculation guide](/blog/sam-smv-calculation-garment-industry.html).)


What the SMV does *not* include is everything that happens between operations and between days: the bundle that hasn't arrived, the thread break, the machine waiting for a mechanic, the operator who didn't come today, the new style everyone is doing for the first time, and the pile-up at the one station that can't keep pace. Efficiency is the ratio between the laboratory number and the real day.


As [Prasanta Sarkar of Online Clothing Study puts it](https://www.onlineclothingstudy.com/2021/08/why-do-garment-manufacturers-plan.html): "Some factories plan efficiency at 60%, some use 80% as target efficiency" — and the reason for planning below 100% "is to give an achievable target to the line." A target nobody can hit isn't a target; it's a morale problem.


## The Verified Benchmarks




Read those numbers together and the picture is clear: the gap between a typical floor (50–60%) and a well-run one (75–85%) is not machinery, and it's not operator quality. It's measurement and management. Bangladesh's RMG sector as a whole averaged [4.19% annual productivity growth from 2014 to 2023](https://apparelresources.com/business-news/manufacturing/automation-drives-productivity-gains-bangladeshs-garment-sector-bids-study-finds/) (BIDS study) — slow, steady, and mostly captured by the factories that measure.


## What Eats the Missing 20–40%



| Loss Source | What It Looks Like on the Floor | Who Can See It Without Data |
|---|---|---|
| Line imbalance | WIP mountains at the slowest operation; idle hands two stations later | Partially — the pile is visible, its cost isn't |
| Style changeover | Day 1–3 of a new style at 30–50% while operators learn | Yes, but usually blamed on operators |
| Machine downtime | Operator waiting for the mechanic; work rerouted late or not at all | Only if someone logs it |
| Absenteeism | A missing operator turns a balanced line into an imbalanced one instantly | Yes — the response speed is what varies |
| Waiting / feeding gaps | Bundles, trims, or thread not at the station when needed | Almost never — it hides inside "busy" floors |
| Rework loops | Defective pieces consuming standard minutes twice | Only with quality data per operation |




Notice the pattern in the last column: most of the losses are **invisible without measurement**. That's why the honest planning number and the improvement program are the same project — you can't raise a number you can't see. (Deep dives: [WIP tracking](/blog/wip-tracking-garment-factory.html) for the imbalance and waiting losses, and [line efficiency calculation](/blog/sewing-line-efficiency-calculation-garment-factory.html) for the formula itself.)


## Planned Efficiency Is a Forecast, Not a Ceiling


A subtlety that trips up owners: planning at 70% does not mean accepting 70% forever. It means your *commitments* (delivery dates, CMT quotes) are built on what the line demonstrably does, while your *improvement work* pushes the demonstrated number up. Quoting a buyer at 85% efficiency while running at 55% doesn't make you ambitious; it makes you late.


The sequencing that works:


      - **Measure actual efficiency continuously** — per line, per style, per day. Not a monthly average from paper sheets; a live number from recorded work. (This is what scan-based tracking automates — see [what an IE does and what software automates](/blog/industrial-engineer-garment-factory.html).)

      - **Plan with the measured number** for the style type in question — new styles lower, repeat styles higher.

      - **Attack the largest measured loss**, one at a time. The published case studies above got 10–24 point gains from line balancing alone.

      - **Re-plan upward when the data sustains it** — not when optimism does.





**From my own floor:** individual operators in my factory regularly beat 100% of SMV on operations they've mastered — our system pays them an automatic efficiency bonus when they cross the threshold, computed at every scan. The *line* never runs at 100% for a day, and it never will: changeovers, absences, and imbalance are facts of production. The difference since we started measuring isn't that the losses vanished — it's that each loss now has a name, a size, and an owner.




## What To Do With This Number Tomorrow Morning


      - **If you don't know your actual efficiency:** assume the industry default — 50% — is closer to your truth than your gut feeling is, and start measuring. Bheda's 47% well-managed-vs-poorly-managed gap is the size of the prize.

      - **If you plan at 100% of SMV capacity:** your delivery dates carry a built-in 20–40% shortfall. Re-quote before your buyers discover it for you.

      - **If you're at 50–60% and measuring:** you're normal, and the documented path (balancing, changeover discipline, live WIP) runs to 75–85%. Every point of efficiency is output you already paid the wages for.






### Scan ERP by Country


        [🇮🇳 India](https://scanerp.pro/india/)
        [🇧🇩 Bangladesh](https://scanerp.pro/bangladesh/)
        [🇻🇳 Vietnam](https://scanerp.pro/vietnam/)
        [🇳🇵 Nepal](https://scanerp.pro/nepal/)
        [🇰🇭 Cambodia](https://scanerp.pro/cambodia/)
        [🇱🇰 Sri Lanka](https://scanerp.pro/srilanka/)
        [🇪🇹 Ethiopia](https://scanerp.pro/ethiopia/)






The uncomfortable question this article leaves you with: is your planned efficiency a measured number — or a hope with a percent sign?


*Santosh Rijal is the founder of [Scan ERP](https://scanerp.pro/), a garment manufacturing ERP system designed for factory floor operations. He works directly with sewing lines, cutting rooms, and production supervisors across Nepal's garment manufacturing sector.*