OpenSpecEngineering

Open data for a field built on precision

Home Contact

Mechanical

Fasteners GD&T Alloys Bearings/Fits Springs Belts/Chains/Gears Pipe/Tube/Thread Welding O-Rings/Seals

Electrical

Wiring/Cable PCB/PWB Symbols/Drawing Standards Connectors Motors/Actuators Grounding/EMI

Civil

Rebar & Reinforcement Structural Steel Shapes Design Loads

Chemical

Instrumentation Symbols (P&ID) Solution Concentration Reference Fluid & Steam Properties

Industrial

Process Chart Symbols Six Sigma & SPC Constants Engineering Economics Factors Anthropometric Data Ergonomic Exposure Limits

Calculators

— Reorder Point & Safety Stock

Statistical safety stock and reorder point for a continuous-review inventory system, SS = z·σ_DLT and ROP = d·L + SS, with lead-time demand variability from both demand and lead-time uncertainty.

Solution

History

Sources:
[1] E. A. Silver, D. F. Pyke, and R. Peterson, Inventory Management and Production Planning and Scheduling, 3rd ed. New York, NY, USA: Wiley, 1998.
[2] S. Chopra and P. Meindl, Supply Chain Management: Strategy, Planning, and Operation, 6th ed. Boston, MA, USA: Pearson, 2016.
[3] S. Nahmias and T. L. Olsen, Production and Operations Analysis, 7th ed. Long Grove, IL, USA: Waveland Press, 2015.

Reference content only — not a substitute for professional engineering judgment. Verify all values, tolerances, and specifications against current official standards before use in production or safety-critical work. Provided without warranty of accuracy or fitness for any purpose.