1. Man (People)
   1. Skill Levels: Operators lacking necessary skills or training can lead to errors and slow production rates.
   2. Workload: Overburdened staff may result in fatigue, increased mistakes, and lower productivity.
   3. Communication: Poor communication among team members can cause misunderstandings and delays.
2. Machine (Equipment)
   1. Calibration: Improperly calibrated machines can result in defects and rework.
   2. Technology: Outdated machinery may not perform optimally, reducing overall efficiency.
   3. Maintenance: Inadequate maintenance schedules can lead to frequent breakdowns and downtime.
3. Material
   1. Quality: Low-quality raw materials can cause defects, waste, and rework.
   2. Supply Chain: Inconsistent or delayed material supply can interrupt production schedules.
   3. Storage: Poor storage conditions may affect material quality and availability.
4. Method
   1. Workflow: Poorly designed workflows can create bottlenecks and slow production.
   2. Standardization: Lack of standardized procedures can lead to variability and inconsistencies.
   3. Processes: Inefficient or outdated processes can slow down production and increase waste.
5. Measurement
   1. Data Accuracy: Inaccurate data can lead to incorrect decisions and suboptimal operations.
   2. Monitoring: Insufficient monitoring of KPIs can delay the identification of issues.
   3. Calibration: Lack of regular calibration can fail to detect inefficiencies and areas for improvement.
6. Mother Nature (Environment)
   1. External Factors: Unstable work environments can reduce productivity and increase the risk of accidents.
   2. Regulations: Lack of regulations may require process adjustments that impact efficiency.
   3. Climate: Extreme temperatures or humidity can affect machinery performance and material quality.