What is Activity Profiling?

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Presentation transcript:

What is Activity Profiling? Warehouse Activity Profiling is the analysis of historical sales transaction data for the purposes of projecting warehouse activity and determining storage mode, physical layout, work flow processes, and labor and equipment requirements.

Profiling Database Source Data INV. MASTER ORDER MASTER ITEM MASTER Inventory Snapshots Average Inventory Levels Order Header Order Detail SKU Number Description Item Cube Pieces Per Case Cases Per Pallet Division Product Group Item Weight Item Ordered Qty Unit of Measure

Developing Profiling Reports & Graphs Inventory Master Data Order Data STEP #1: CONSOLIDATE & CALCULATE Item Master Data STEP #2: ANALYZE (Sort / Rank) & PRESENT

How Do You Design a Warehouse? Two Ways To Design a Warehouse Storage Driven Approach via Cube Analysis Picking Driven Approach via Order Analysis Storage Driven Picking Driven

What is the Storage Driven Approach to Design? PART I: PART II: PART III: Define Your Storage Zones Design Your Forward Pick Areas Define How You Will Plan & Pick Orders

Designing a Warehouse Part I Define Your Storage Zones

Categorize Items By Cubic Ft of Inventory Calculate the cubic feet of storage that each item requires and then assign it to an “inventory container” of the appropriate size. Pallet Rack Bin Shelving Multi-Pallet Drive In Rack Drawers .125 1.5 40.0 320.0 Cubic Feet of Storage Required For An Item

Develop an Inventory Container Graph Drawers Now you can begin to think about what storage modes might be reasonable candidates for the merchandise you are storing…

Develop a Pick Size Classification Scheme Next develop a classification scheme for picks based on the size of the pick. Usually designers will use pallet”, “case”, and “piece” pick sizes Piece Pick Case Pick Pallet Pick

Assess the Activity In Each Inventory Container Assess the activity in the larger containers to see if there is the possibility that some of the items should be moved to a forward pick area. The decision will be driven by the # of such picks in the container and the overall size of the larger container storage area. Piece Pick Activity Curve Move these to Case Storage

Designing a Warehouse Part II Define Your Forward Pick Areas Reserve Areas Part II Define Your Forward Pick Areas Forward Pick Areas

General Process for Forward Pick Design Questions that Must Be Answered About the Forward Pick Area(s): How many forward pick areas do you need? Determine how many SKUs should go on the pick line Removing unusual SKUs from the pick line Sequence the SKUs on each pick line

You will likely have multiple forward pick areas For each Pick Size you need to decide if there are a lot of picks associated with a relatively small subset of the items. If so, you will likely want to set up a forward pick area for that Pick Size. 80% of Picks from 20% of Items These Items should go into a forward pick area.

Determining How Many Items in Forward Pick Generally to determine how many items you are going to put in the forward pick area you look at the tradeoff between adding an item into the forward pick area and the % of additional orders you are then able to complete in that area. % Case Trade Off: Space Utilization and Efficiency Number of % Days Picks SKUs Picked Filled 20 33 99 20 40 60 80 100% 20 40 60 80 100% 30 46 97 40 52 95 50 67 93 60 73 92 70 79 90 80 81 83 90 84 79 100 88 68 110 92 63 120 92 52 20 40 60 80 100 120 140 160 130 95 44 140 98 33 Number of SKUs 150 98 25 160 100 22 % Days Picked % Case Picks Filled

Determining How Many Items in Forward Pick 90

Designing a Warehouse Part III Define How To Plan & Pick Orders

Wave Planning & Picking Approaches Daily Order Pool Orders of this “type” get released to the floor and picked in the following manner every X hours Orders of this “type” get released to the floor and picked in the following manner every Y hours While designers make assumptions at the start of a design about how the bulk of the orders will be released and picked, the details behind their thinking are not usually flushed out until the end of the project. They often also wait until the end to define the planning and picking approaches for the exceptional orders.

Ways in which you can process orders differently Order Selection Criteria & Groups Rush vs Regular Orders Geography (West Coast vs East Coast) Orders Requiring Personalized Merchandise Single vs Multi-Line Orders Types of Picks Needed to Complete Order Order Cube (Sm Pkg vs LTL vs TL) Forced Upon You By The Business Efficiency Opportunity

Assess the Significance of Single Unit Orders Units/Order as a Percentage of Total Orders 45% of all Orders are single unit orders. One of the greatest opportunities to improve warehouse efficiency is choosing a different mechanism for picking single unit orders from multi-unit orders.

Assess the significance of grouping by area Reserve (Pallet) Area Orders Completed By Area Case Forward Pick Area Piece Forward Pick Area Orders that require merchandise coming from different storage areas within the warehouse may need to be picked differently.

Deciding on a Picking Approach Order #1 Order #2 Sorting Picks at End of Tour Single Order Picking Multi-Order Picking Batch Picking After the different groups of orders have been identified, the designer has to make a decision about how each group of orders will be picked.

How Will Orders in Forward Pick Be Picked? Multi-Order Picking Cart Order #2 Order #3 Order #1 Good candidates for Multi Order Picking This approach was fraught with problems. First of all, Batch Picking has inherent to it a certain lead time. You can’t ship an order until all the orders associated with the batch are picked and distributed. Second, the manual distribution of the batch picks to orders was an accident waiting to happen. Stacks of boots could fall over easily, operators could miss dropping off a box, things could get lost. The end result was many orders were waiting around at the end of a wave for something or another. Finally, ACME recognized that their cost/boot had increased substantially over their previous costs.

Deciding on a Picking Medium Label Picking Radio Frequency (RF) Barcode Picking Voice Picking For each picking approach you need to decide on a mechanism for how picks will be communicated to pickers. Pick To Light

How Do You Plan & Pick Different Orders Order Group Pick Method Pick Medium Small Cube Multi-Line Orders Multi-Order Picking RF Terminals Single Line Orders Batch Picking Labels

Summary of Warehouse Design Process PART I: PART II: PART III: Define Your Storage Zones Design Your Forward Pick Areas Define How You Will Plan & Pick Orders

Observations Every descriptive tool or technique seems to be based on a specific “need” Profiling/design is less about “describing” an “as is” warehouse, than about saying how it “should have been” It’s hard to integrate the different descriptive tools and techniques Can we build a comprehensive, computational “description” from which all the different “needs” can be met?

Schema Process Reference Model Domain Model Instance

AMPL, AIMS, GAMS, and other “modeling languages” incorporate a reference model for the domain of optimization models, and are used to create instances of optimization models.

Can reference models be developed for the domain of discrete event logistics systems, or for subsets of the domain, e.g., warehouses, factories, and supply chains?