OpenSpecEngineering

Open data for a field built on precision

— Industrial Engineering Reference Material

Process Chart Symbols

ASME flow-process-chart symbols (operation, transport, inspection, delay, storage), the therblig list, and ANSI/ISO flowchart shapes.

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Six Sigma & SPC Constants

Shewhart control-chart factors, the sigma / DPMO / yield table, standard-normal z-values, and process-capability guidance.

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Engineering Economics Factors

Discrete compound-interest factor formulas and tables, MACRS depreciation rates, nominal-vs-effective interest conversion, and learning-curve rates and factors.

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Anthropometric Data

Representative adult body dimensions at the 5th, 50th, and 95th percentiles for workstation, clearance, and reach design.

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Ergonomic Exposure Limits

NIOSH lifting multipliers, OSHA/NIOSH noise limits, hand-arm and whole-body vibration action values, and WBGT heat-stress guidance.

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Acceptance Sampling (MIL-STD-105E)

Sample size code letters, single sampling plans with Ac/Re numbers for normal, tightened and reduced inspection, and the switching rules.

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OSHA Walking-Working Surfaces

OSHA 29 CFR 1910 Subparts D and E: guardrail, stair, ladder and handrail dimensions, fall protection trigger heights and exit route rules.

Open OSHA Walking-Working Surfaces →