ConvertLab
Unit converter for length, mass, pressure, energy and temperature.
Industrial Engineering Toolkit
Your engineering workspace.
Practical tools for industrial engineers, from unit conversions to production performance.
- Tools
- 04 of 04
- Categories
- 05
- Units
- 34
Tool 01 · Preview
ConvertLab
km
mi
1 km = 0.621371 mi
Sec. 01 — Tool directory
Modules
All four tools are available, built on the same foundation.
Production Efficiency & OEE
Availability, performance and quality combined into overall equipment effectiveness.
Inventory Management
Order quantities, reorder points and safety stock with worked results.
Capacity Planning
Utilization, efficiency and bottleneck analysis for a serial production line.
Sec. 02 — Tool 01
ConvertLab
Pick a category, enter a value, and the result updates as you type.
Sec. 03 — Tool 02
Production Efficiency & OEE
Enter the figures for one production run to see availability, performance, quality and OEE.
Overall equipment effectiveness
OEE
Availability × Performance × Quality
Availability
Lowest—
Performance
Lowest—
Quality
Lowest—
- Operating time
- — min
- Good units
- — units
Performance analysis
Performance is above 100%. More units were produced than the ideal cycle time allows in the operating time, so the inputs may be inconsistent. Check the ideal cycle time, unit count and downtime. The value is shown as calculated, not capped.
These suggestions are general guidance, not a definitive diagnosis.
Sec. 04 — Tool 03
Inventory Management
Work out how much to order, when to reorder and what it costs per year for one stocked item.
Correct the highlighted ordering inputs to see EOQ and cost results.
Correct the highlighted replenishment inputs to see safety stock and reorder point.
Economic order quantity
EOQ— units
Total relevant annual cost
—
Safety stock
SS— units
Reorder point
ROP— units
The standard deviation is larger than average daily demand. A normal distribution fits such demand poorly, so treat this safety stock with caution.
Cost breakdown
- Annual ordering cost
- —
- Annual holding cost
- —
- Cost at EOQ
- —
- Extra cost vs EOQ
- —
Purchase cost of the items is excluded: it does not change with the order quantity. Costs are in the currency you entered.
Supporting calculations
- Orders per year
- —
- Days between orders (365-day year)
- —
- Average cycle stock (Q/2)
- —
- Demand during lead time (d × L)
- —
- z-score
- —
- Operating days implied (D ÷ d)
- —
Rounding
Safety stock and reorder point are rounded up to whole units: rounding down would give less protection than the chosen service level. EOQ is rounded to the nearest whole unit; total cost changes very little near the optimum, so a convenient pack size close to the EOQ is fine.
Assumptions
- Daily demand is roughly normally distributed and independent from day to day.
- Lead time is constant; only demand varies.
- Service level is the probability of not running out during one replenishment cycle, not the share of demand filled.
- EOQ assumes steady demand, fixed ordering and holding costs, and no quantity discounts.
Sec. 05 — Tool 04
Capacity Planning
Measure how much of your capacity is used, and find the station that limits a serial production line.
Correct the highlighted capacity inputs to see utilization and efficiency.
Utilization
—
Efficiency
—
Actual output is above effective capacity, so efficiency exceeds 100%. The effective capacity or the output figure may be inconsistent; check that both cover the same period. The value is shown as calculated, not capped.
Capacity summary
- Design capacity
- — units/shift
- Effective capacity
- — units/shift
- Actual output
- — units/shift
- Unused design capacity
- — units/shift
- Planned allowance (design − effective)
- — units/shift
Correct the highlighted station inputs to see the bottleneck analysis.
Bottleneck station
Tied—
Maximum theoretical line throughput
— units/hour
Station capacity comparison
Insights
Assumptions
This is a simplified theoretical model. Real lines lose capacity to stoppages, changeovers and variation, so actual throughput will be lower.
- One product type.
- Serial production line: every unit passes through every station in order.
- Identical parallel machines within each station.
- No breakdowns or setup losses.
- No material shortages.
- No rework loops.
- All stations operate for the same period.
Sec. 06 — Plans
Pricing
Demonstration only. These plans are examples. No payments or subscriptions are available.
Student
$0/month
For coursework and labs.
- All four tools
- English and Turkish, light and dark themes
- Works in any modern browser
Pro
$4/month
Example of a paid tier. These extras do not exist.
- Everything in Student
- Saved scenarios (example)
- Export to PDF and spreadsheet (example)