Verifying factory capacity through on-site evidence requires a systematic, multi-faceted approach. Here's a step-by-step guide to ensure accuracy:

• Review Documentation: Request capacity data, production schedules, maintenance logs, and certifications (ISO, etc.).
• Define Scope: Focus on specific product lines, machines, or processes relevant to your order.
• Prepare Audit Tools: Use checklists, cameras, stopwatches, and templates for data collection.

On-Site Inspection: Key Areas to Verify

A. Equipment & Infrastructure

• Machine Count & Condition:
  • Tally machines listed in supplier docs vs. actual units. Check for wear, age, and maintenance stickers.
  • Evidence: Photos, serial numbers, maintenance logs.
• Machine Utilization:
  • Observe machines during production. Measure cycle times and downtime.
  • Evidence: Stopwatch data, shift logs, real-time monitoring systems.
• Support Infrastructure:
  • Inspect power supply (backup generators), HVAC, compressed air, and water systems. Test capacity under load.
  • Evidence: Utility bills, system pressure gauges, load test results.

B. Labor & Human Resources

• Headcount Verification:
  • Count workers per shift during production hours. Compare with payroll records.
  • Evidence: Attendance sheets, time cards, headcount photos.
• Skill & Experience:
  • Assess worker competency through operator interviews or skill demonstrations.
  • Evidence: Training certificates, performance reviews.
• Shift Patterns:
  • Verify shift schedules and overtime. Check if multiple shifts align with claimed capacity.
  • Evidence: Shift rosters, production reports.

C. Process & Workflow

• Production Flow:
  • Map the process flow (raw materials → finished goods). Identify bottlenecks.
  • Evidence: Process diagrams, video recordings, WIP (Work-in-Progress) counts.
• Quality Control:
  • Inspect QC stations, testing equipment, and defect rates.
  • Evidence: QC reports, calibration certificates, defect logs.
• Material Handling:
  • Assess storage capacity (raw materials, WIP, finished goods) and logistics.
  • Evidence: Warehouse capacity measurements, inventory records.

D. Scalability & Flexibility

• Expansion Potential:
  • Check for unused space, pending equipment orders, or construction plans.
  • Evidence: Site maps, purchase orders for new machinery.
• Multi-Product Capability:
  • Observe changeover times between different product runs.
  • Evidence: SMED (Single-Minute Exchange of Die) logs, production schedules.

Data Analysis & Cross-Verification

• Cross-Check Claims:
  • Compare supplier’s capacity data (e.g., "100 units/hour") with your observations:
    • Formula: Actual Output = (Machines × Utilization Rate × Output Rate per Machine).
    • Example: 10 machines × 85% utilization × 12 units/hour = 102 units/hour.
• Review Historical Data:
  • Analyze past production records, shipping manifests, and customer orders.
  • Evidence: ERP/SAP reports, shipping documents.
• Calculate OEE (Overall Equipment Effectiveness):
  • OEE = Availability × Performance × Quality. Aim for >70% for mature factories.
  • Evidence: OEE dashboards, downtime logs.

Environmental & Safety Checks

• Safety Culture: Observe safety compliance (e.g., PPE usage, emergency exits). Poor safety correlates with lower efficiency.
• Environmental Controls: Verify temperature/humidity controls for sensitive processes.
  • Evidence: Safety audit reports, environmental sensor data.

Post-Visit Actions

• Compile Evidence: Organize photos, videos, timestamps, and signed statements from managers.
• Discrepancy Analysis: Flag inconsistencies (e.g., 80 machines claimed vs. 60 observed).
• Third-Party Verification: Use independent auditors (e.g., SGS, Bureau Veritas) for unbiased validation.

Red Flags to Watch For

• Idle Machines: Equipment running below 70% utilization during peak hours.
• Labor Shortages: Workers multitasking across critical processes.
• Inconsistent Data: Maintenance logs showing "no downtime" despite visible machine issues.
• High WIP Piles: Indicates process bottlenecks or quality delays.
• Overpromising: Suppliers claiming capacity far exceeding industry benchmarks.

Key Evidence to Collect

Conclusion

On-site verification transforms theoretical capacity into tangible proof. Focus on real-time observations, data triangulation, and cross-referencing supplier claims with physical evidence. Always validate scalability and sustainability—true capacity isn’t just about current output but the factory’s ability to meet future demands reliably. For critical orders, combine on-site audits with unannounced visits to ensure ongoing compliance.