Table of ContentsLogistics Systems Design: Storage Systems Warehousing Systems Overview Unit Load Storage Policies Overview Storage Policy Definition Unit Load Storage Definitions Pallet Rack Example Unit Load AS/RS Unit Load AS/RS Schematic Ocean Going Container Ship Ocean Going Intermodal Container Unit Load Advantages Unit Load Disadvantages Command Cycles Warehousing Objectives Warehousing Objectives Continued Main Storage Principle to Maximize Storage Capacity Main Storage Principle to Minimize Travel Shared Storage Example: Frequency of Access Distribution Unit Load Storage Policies Cycle Inventory Pattern Dedicated vs. Shared Storage Policies: Product Dedicated Dedicated vs. Shared Storage Policies: Product Shared Warehousing Sharing Factor and Balance Storage Literature Review Unit Load Storage Policies Overview Unit Load Warehouse Product Information (Factoring) Factoring Condition Travel Independence Warehouse Factoring Distances Demand Based Layout Demand Based Layout Total Travel Time for Demand Based Layout Inventory Based Layout Inventory Based Layout Total Travel Time for Inventory Based Layout Frequency of Access Product Turnover Dedicated Storage Layout (Factoring) Total Travel (Factoring) Frequency of Access Based Storage Policy Product Information (Non-Factoring) Product A Expected Distances Product B Expected Distances Product C Expected Distances Product Storage Assignment Formulation (Non-Factoring) Product Turnover Dedicated Storage Layout (Non-Factoring) Total Travel (Non-Factoring) Product Turnover Class Based Storage Turnover Based Class Storage Policy Inventory Distribution Zone Size Determination Based on Service Level a Safety Inventory for Product Turnover Based Storage Unit Load Storage Policies Overview Shared Storage Example: Product Information Shared Storage Example: Rack Information Shared Storage Example: Rack Travel Times Shared Storage Example: Product Dedicated Travel Shared Storage Example: Product Turnover Storage Shared Storage Example: Days 4K+1 and 4K+2 Shared Storage Example: Days 4K+2 and 4K+3 Shared Storage Example: Days 4K+3 and 4K+4 Duration of Stay Shared Storage Shared Storage Example: Duration-Of-Stay Storage Closest-Open-Location (COL) Storage Shared Storage Example: Frequency of Access Distribution Shared Storage Example: Shared Versus Dedicated Duration of Stay Shared Storage Observations Perfectly Balanced Warehouse Product Schedule Information Unit Load Duration of Stay Unit Load Duration of Stay Shared Storage Layout Total Travel (Duration-Of-Stay) Total Travel (Duration-Of-Stay) Closest-Open-Location (COL) Storage Closest-Open-Location Travel Time Not Perfectly Balanced Systems Safety Inventory for Duration-Of-Stay Storage Unit Load Storage Policies Overview Experiment Travel versus Batch Size Travel Time versus Number of Products Storage Policies Comparison Observations Unit Load Storage Policies Overview Storage Policy Conclusions Warehousing Systems Overview Pick versus Reserve Storage Overview Order Picking Operations How Much Space for a Product in the Active Pick Area Pick versus Reserve Areas Manual Order Picking Area Small Parts Carousel Order Picking System A-Frame Order Picking System Pick versus Reserve Problem Pick versus Reserve Storage Overview Pick Versus Reserve Notation Pick versus Reserve Formulation Pick versus Reserve Formulation Characteristics Pick versus Reserve Storage Overview Space Allocation Subproblem: Formulation Space Allocation Subproblem: Heuristic Solution “Square Root Law” for Space Allocation How Much Space for a Product in the Active Pick Area Greedy Product Ranking Heuristic for Master Problem Hackman-Rosenblatt Heuristic Heuristic Accelerations Pick versus Reserve Storage Overview Warehouse Configuration Problem Rule-Based Configuration Science-Based Configuration Optimum Assignment Factors Warehouse Configuration Heuristic How Much Space for a Product in the Active Pick Area Ratio of a Product Family i Assumptions Pick versus Reserve Storage Overview Conclusions Warehousing Systems Overview Block Stacking Overview Block Stacking Overview Block Stacking Example Block Stacking Illustration Block Stacking Example: Soft Drink Bottling Block Stacking Storage or Retrieval Operation Block Stacking Storage of Household Appliances Block Stacking Applications Block Stacking Characteristics Block Stacking Terminology Application Areas Block Stacking Objectives Required Decision Policies Space Utilization Objective Basic Space-Time Tradeoff Assumptions Space-Time Tradeoff for Dedicated Storage Space-Time Tradeoff for Shared Storage Shared Storage Block Stacking Ground Plan Notation for Parameters Notation for Variables Single Lane Depth Derivation: Lane Occupation Times Single Lane Depth Derivation: Total Space-Time Consumption Single Lane Depth Derivation: Optimal Single Lane Depth Single Lane Depth for Multiple Products Example Single Lane Depth for Multiple Products Enumeration Single Lane Depth Derivation Number of Occupied Lanes Distribution Number of Lanes of a Depth Distribution Number Lanes Determination Based on Service Level a Literature Review Literature Review Optimal Triangular Pattern Depth Pattern Selection Experimental Comparison of Policies Experimental Comparison: Aisle to Pallet Ratio (A/L) Experimental Comparison: Number of Stacks (Q) Experimental Comparison: % On Hand Inventory (I) Block Stacking Design Program Warehouse Layout Policy... Warehouse Layout Policy cont. Deep Lane Storage System Deep Lane Storage System Detail Deep Lane Storage Example |
Author: Marc Goetschalckx
Email: marc.goetschalckx@isye.gatech.edu Home Page: www.isye.gatech.edu/~mgoetsch/index.html Other information: Best experienced with |
