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Industrial Engineering

Industrial Engineering for GATE Mechanical Engineering, one topic per lesson: the theory in plain words, the formulas, a solved example, and GATE-style questions (MCQ, MSQ and NAT) whose numerical answers are recomputed by a program when the site is built.

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1Production Planning

  1. Forecasting and Production PlanningMoving average, weighted average and exponential smoothing forecasts, linear regression, forecast errors (MAD, MSE, bias), aggregate planning, MRP and line balancing.

2Inventory

  1. Inventory Control and EOQ ModelsInventory costs, the economic order quantity model, total cost, production (EPQ) model, quantity discounts, safety stock and reorder point, and ABC analysis.

3Operations Research

  1. Linear Programming, Transportation and AssignmentFormulating LP problems, graphical method, simplex method, duality, transportation problems (NWC, VAM, MODI) and assignment problems by the Hungarian method.
  2. Queueing Theory, PERT and CPMM/M/1 queue formulas (utilisation, queue length, waiting time, Little's law), network diagrams, critical path, floats, and PERT expected time and variance.

4Operations Management

  1. Scheduling, Work Study and Quality ControlSequencing rules (SPT, EDD), Johnson's rule for two machines, work study and standard time, break-even analysis, control charts and acceptance sampling.