OTT CAD Workflow: Industrial Standard

 

OTT CAD Workflow: 

Industrial Standard


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A. Industrial Standard

(Garment Pattern CAD System)

B. Factory Industrial CAD Workflow (advance)

(Garment Manufacturing Environment)

A. Industrial Standard

(Garment Pattern CAD System)

🔹 Phase 1: Pre-Production Data Setup

1️⃣ Tech Pack Analysis

✔ Buyer Tech Pack সংগ্রহ
✔ Measurement chart যাচাই
✔ Construction details বুঝে নেওয়া
✔ Seam allowance requirement চেক

👉 এই ধাপে ভুল হলে পরের সব ধাপে সমস্যা হবে।

2️⃣ Style Creation (CAD System)

✔ Style Name
✔ Buyer / Order No
✔ Season
✔ Base Size নির্বাচন

👉 Project structure তৈরি করা হয়।

🔹 Phase 2: Pattern Development

3️⃣ Base Pattern Drafting

✔ Front / Back / Sleeve ড্রাফট
✔ Dart, Pleat, Curve, Armhole shape
✔ Balance & symmetry চেক

👉 এই প্যাটার্নই হবে “Master Pattern”

4️⃣ Seam Allowance & Construction Setup

✔ Seam allowance যোগ
✔ Notch বসানো
✔ Drill hole চিহ্ন
✔ Internal line মার্কিং

👉 Sewing department এর জন্য প্রস্তুত করা হয়।

5️⃣ Pattern Info Setting

✔ Pattern Name
✔ Code
✔ Cut Qty
✔ Grainline direction
✔ Max Slant Angle

👉 Marker planning ও production tracking এর জন্য প্রয়োজনীয়।

🔹 Phase 3: Size & Grading Control


6️⃣ Size Setup

✔ Size Range (S–XXL)
✔ Base Size Confirm
✔ Measurement Chart Input

7️⃣ Grading

✔ Grade Rule Apply
✔ X & Y movement check
✔ All size overlay verify

👉 Fit consistency বজায় রাখা হয়।

🔹 Phase 4: Pattern Validation

8️⃣ Pattern Checking

✔ Seam length match
✔ Curve smoothness
✔ Open segment আছে কিনা
✔ Walk check (front vs back seam)
✔ Grainline alignment

👉 QC Stage (Internal CAD QC)

9️⃣ Sample Print & Fit Approval

✔ Base size print
✔ Sample develop
✔ Fit session
✔ Correction apply

👉 Buyer Approval না পাওয়া পর্যন্ত repeat হতে পারে।

🔹 Phase 5: Marker Planning

🔟 Fabric Setup

✔ Fabric width
✔ Fabric type
✔ Shrinkage allowance

1️⃣1️⃣ Marker Making

✔ Size ratio সেট
✔ Grain restriction follow
✔ Pattern placement
✔ Efficiency optimize

👉 লক্ষ্য: সর্বোচ্চ marker efficiency

1️⃣2️⃣ Marker Validation

✔ Total consumption
✔ Fabric utilization %
✔ Cut order plan

🔹 Phase 6: Final Output & Production Release

1️⃣3️⃣ File Export

✔ DXF Export
✔ PLT File
✔ PDF Pattern

1️⃣4️⃣ Documentation & Archiving

✔ Pattern version control
✔ Marker file backup
✔ Production record সংরক্ষণ

🎯 Industrial Workflow Summary (Hierarchy)

Tech Pack → 
Style Setup → 
Base Pattern → 
Seam & Info Setup → 
Size & Grading → 
Pattern QC → 
Fit Approval → 
Marker Making → 
Efficiency Check → 
Export & Production Release

🔥 Industry Reality

✔ বড় ফ্যাক্টরিতে আলাদা বিভাগ থাকে:
Pattern Team
CAD Team
Marker Team
QC Team
✔ Version control খুব গুরুত্বপূর্ণ
✔ Buyer change এ পুরো workflow আবার চলতে পারে


B. Factory Industrial CAD Workflow (advance)

(Garment Manufacturing Environment)

🔷 1️⃣ Merchandising → CAD Handover

🔹 Merchandising Team

✔ Buyer Tech Pack গ্রহণ
✔ PO (Purchase Order) নিশ্চিত
✔ Measurement chart চূড়ান্ত
✔ Fabric details সংগ্রহ

👉 Tech Pack CAD Department-এ হস্তান্তর

🔷 2️⃣ Pattern Development Department

🔹 Master Pattern Maker

✔ Base pattern drafting
✔ Construction detail সেট
✔ Seam allowance যোগ
✔ Pattern balance চেক

👉 Sample Room-এ পাঠানো হয়

🔷 3️⃣ Sample Development

🔹 Sample Room

✔ Base size sample তৈরি
✔ Fit sample প্রস্তুত
✔ Buyer fit comments গ্রহণ

👉 Correction থাকলে Pattern Maker revise করে

⚠️ এই ধাপ কয়েকবার repeat হতে পারে।

🔷 4️⃣ CAD Department (Digital Control Stage)

🔹 CAD Operator

✔ Pattern Digitizing / Draft Import
Paper pattern হলে digitize
অথবা CAD-এ direct draft

✔ Pattern Info Setup
  1. Pattern Name
  2. Code
  3. Cut Qty
  4. Grainline
  5. Fabric type

✔ Size Setup
  1. Size Range input
  2. Base size confirm

✔ Grading Apply
  1. Grade rule apply
  2. All size check

🔷 5️⃣ CAD QC (Quality Control)

🔹 CAD QC Officer

✔ Seam match check
✔ Measurement verify
✔ Curve smoothness
✔ Notch alignment
✔ Open line check

👉 Approved হলে Marker Team-এ পাঠানো হয়

🔷 6️⃣ Marker Planning Department

🔹 Marker Maker

✔ Fabric Setup
  1. Fabric width
  2. Lay plan
  3. Shrinkage

✔ Marker Making
  1. Size ratio
  2. Grain restriction
  3. Efficiency optimize

🎯 লক্ষ্য: সর্বোচ্চ fabric utilization

🔷 7️⃣ Marker Approval

🔹 IE / Planning Team

✔ Consumption calculation
✔ Marker efficiency %
✔ Cost impact analysis

👉 Final marker freeze

🔷 8️⃣ Cutting Department Release

✔ PLT / DXF File Export
✔ Plot print
✔ Cutting order release

🔷 9️⃣ Production Start

✔ Bulk cutting
✔ Sewing line start
✔ Inline QC monitoring

🔷 🔟 Archiving & Version Control

✔ Pattern version save
✔ Marker file backup
✔ Buyer revision history maintain

🏭 Factory Department Structure (Typical)

DepartmentResponsibility
MerchandisingBuyer communication
PatternBase pattern develop
SampleFit approval
CADDigitize, grading
CAD QCPattern verification
MarkerFabric optimization
IEConsumption & costing
CuttingProduction cutting



🎯 Real Factory Workflow Flow

Buyer Tech Pack
     ↓
Pattern Draft
     ↓
Sample & Fit Approval
     ↓
CAD Grading
     ↓
CAD QC
     ↓
Marker Making
     ↓
Consumption Approval
     ↓
Cutting Release
     ↓
Bulk Production

🔥 Important Factory Rules

✔ Buyer approval ছাড়া bulk marker করা যাবে না
✔ Grade rule ভুল হলে পুরো order reject হতে পারে
✔ Efficiency কম হলে costing increase হবে
✔ Version control maintain না করলে production error হবে



***
IE = Industrial Engineering

🏭 IE (Industrial Engineering) কী?

গার্মেন্টস ফ্যাক্টরিতে Industrial Engineering (IE) টিম উৎপাদন প্রক্রিয়া বিশ্লেষণ, সময় নির্ধারণ, দক্ষতা বৃদ্ধি এবং কস্ট কন্ট্রোল নিয়ে কাজ করে।
তারা মূলত কাজ করে:
⏱ Production time calculation
📊 Efficiency measurement
💰 Cost control
🧵 Line balancing
📦 Production planning


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