Interpreting Charts
10 minutes
Pie Chart
The pie chart shows the percentage distribution of time:
Productive: 68%
Delays: 20%
Non-productive: 12%
How to Interpret
- Green (productive) should be the largest portion
- Yellow (delays) indicates improvement opportunities in the system
- Red (non-productive) indicates worker inefficiencies
💡 Typical benchmark
- • Excellent: >80% productive
- • Normal: 60-80% productive
- • Room for improvement: <60% productive
Bar Chart
The bar chart lets you compare:
Productivity by Work Station
Assembler A72%
Assembler B65%
Inspector82%
Packer58%
What to Look For?
- Work stations with low productivity: May indicate specific problems
- Large differences between work stations: Possible load imbalance
- Patterns: Is there something in common among the less productive stations?
Confidence Interval
Next to each percentage you will see the error margin:
68% ±4.7%
The real value is between 63.3% and 72.7% with 95% confidence
A small interval (±2-3%) indicates high precision. A large interval (±10%+) indicates that you need more observations.
Delay Analysis
Delays are especially important because they representsystem problems that can be solved:
Top 3 Delays
- 1. Waiting for material15.1%
- 2. Machine breakdown3.2%
- 3. Waiting for instructions1.7%
In this example, "Waiting for material" consumes 15% of the time. Improving the supply logistics could recover those productive hours.
Study Validity
The report indicates whether your study is statistically valid:
- ✅ Valid: You reached the required observations
- ⚠️ In progress: Still missing observations for the configured precision
🎯 Next Step
Now that you know how to interpret the charts, we will learn how toexport everything to Excel for professional presentations.