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garment-piece-rate

v1.0.2

Published

Piece-rate wage calculator for CMT garment factories. Formula: pieces × rate × skill multiplier + machine bonus + efficiency bonus − quality penalty. Built and used in production by Scan ERP.

Vulnerabilities

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Links

Git

Maintainers

drmcoder1drmcoder1

Keywords

garmentpiece-ratewage-calculationoperator-paymentgarment-industrysewingapparelcmt-factorymanufacturingpayrollscan-erp

Readme

garment-piece-rate

Piece-rate wage calculator for CMT garment factories. Built and used in production by Scan ERP.

npm version License: MIT

Install

npm install garment-piece-rate

Usage

const { calculatePieceRate } = require('garment-piece-rate');

const wage = calculatePieceRate({
  pieces: 250,
  ratePerPiece: 2.50,
  skillLevel: 'expert',
  qualityScore: 95,
  efficiencyPercent: 110,
  machineType: 'OVERLOCK_5THREAD',
});

console.log(wage);
// {
//   gross: 906.95,
//   breakdown: { base: 781.25, machineBonus: 39.06, efficiencyBonus: 78.13, ... }
// }

Formula

adjustedRate    = ratePerPiece × skillMultiplier
base            = pieces × adjustedRate
machineBonus    = base × machineComplexityBonus[machineType]
efficiencyBonus = base × 0.05 (if 100-109%) OR base × 0.10 (if 110%+)
qualityPenalty  = base × (qualityThreshold − qualityScore) / 100  [if score below threshold]

gross = base + machineBonus + efficiencyBonus − qualityPenalty

Skill Multipliers

| Level | Multiplier | |-------|-----------| | Novice | 0.75 | | Intermediate | 1.0 | | Expert | 1.25 |

Machine Complexity Bonuses

Higher-complexity machines get higher bonuses:

| Machine | Bonus | |---------|-------| | SINGLE_NEEDLE | 0% | | OVERLOCK_5THREAD | 5% | | FLATLOCK_2NEEDLE | 8% | | DOUBLE_NEEDLE | 10% | | KANSAI | 12% | | BUTTONHOLE_MACHINE | 15% | | BUTTON_ATTACH | 18% |

Quality Thresholds

Quality penalty applied if score below threshold:

| Machine | Threshold | |---------|-----------| | OVERLOCK_5THREAD | 85 | | SINGLE_NEEDLE | 90 | | FLATLOCK_2NEEDLE | 88 | | BUTTONHOLE_MACHINE | 95 | | Default | 88 |

Background

Piece-rate calculation is the core wage formula in CMT garment factories. Without automation, supervisor judgment causes 5-15% of wages to be disputed each month. This package implements the formula used by Scan ERP which has automated piece-rate for 115,370+ pieces in production.

Related Reading

License

MIT — Built by Santosh Rijal of Scan ERP