Knowledge Hub / Free tools

Free IE calculators

Quick answers for everyday industrial engineering work. Everything is calculated in your browser - nothing is saved or sent.

Target & efficiency Line balancing Man machine ratio Machine requirement Time study

Target & efficiency

Plan a line's target, or check the efficiency it achieved.

Style SAM (minutes)

Manpower (operators + helpers)

Working hours

Planned efficiency %

Actual output, pieces (optional)

Available minutesMP × hours × 60–

Target per hour–

Target per dayAvailable min × eff% ÷ SAM–

Actual efficiencyOutput × SAM ÷ available min–

Line balancing

One operation per line: name, SMV, operators. Paste from Excel with commas or tabs.

Operations

Total SMV / operators–

Pitch time (ideal)Total SMV ÷ operators–

BottleneckHighest SMV ÷ operators–

Output per hour at bottleneck–

Balance efficiencyPitch time ÷ bottleneck time–

Man machine ratio (MMR)

Total employees for every running machine - a key cost indicator.

Operators

Helpers

Supervisors, QC, IE, others

Running machines

Total employees–

Man machine ratioTotal employees ÷ running machines–

Direct ratio(Operators + helpers) ÷ machines–

Helpers per operator–

Machine requirement

How many machines of one type a style needs to hit its target.

Total SMV of operations on this machine type (min)

Target per hour (pcs)

Expected efficiency %

Minutes needed per hourSMV × target–

Exact machinesSMV × target ÷ (60 × eff%)–

Machines to plan (rounded up)–

Time study

Observed cycle times with rating and allowance, as in a capacity study.

Observed cycle times in seconds (comma separated)

Rating %

Allowance %

Bulletin SAM for this operation (min, optional)

Average observed time–

Normal timeObserved × rating%–

Standard timeNormal × (1 + allowance%)–

Capacity per hour60 ÷ standard time–

Efficiency vs SAMSAM ÷ standard time–

These tools give quick estimates. Read the Knowledge Hub for how each formula works.

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