Категории: Все - evaluation - algorithms - performance - systems

по Santiago Martínez 4 лет назад

214

Warehouse design and control: Framework and literature review

The text discusses various methods and problems associated with warehouse design and control, categorized into tactical, strategic, and operational levels. It begins by examining different warehouse design methods, highlighting contributions from Duve and Bocker, Frazelle and Hackman, and others who propose step-wise and empirical approaches.

Warehouse design and control: Framework and literature review

Warehouse design and control: Framework and literature review

Warehouse design problems

Operational level
Short-term decisions

Assignment and control of personnel and equipment problems.

Tactical level
Medium-term decisions

Dimensions of resources

Number of employees

System sizes

Storage

Strategic level
Long-term decisions

Selection of types of storage systems

Process design

A review of warehousing models

Warehouse design problems: Operational level
Overview

the overall picture that emerges seems to suggest that current research, although useful in itself

most papers seem to focus on isolated warehouse organizational policies

Miscellaneous

Van den Berg analyzes a number of operational control problems

Sarker and Babu review the literature concerning the operational control of AS/RS's

Storing and sequencing

Schwartz use simulation to approximate the maximum throughput of an AS/RS

Van Oudheusden analyze this problem for a person-on-board AS/RS

Graves evaluate the impact of sequencing and class-based storage policies on warehouse performance

Dwell point selection

Peters present an analysis to approximate the response time for multiple AS/RS configurations and dwell point policies.

Egbelu and Wu evaluate several dwell point policies

Egbelu presents an algorithm for the dwell point selection

Routing and sequencing

Ratli€ and Rosenthal present an algorithm for the routing

Hall and De Koster and Van der Poort determine analytical expressions to evaluate the routing

Gelders and Heeremans analyze routing in a conventional warehouse

Storage policies

SubJarvis and McDowell propose a heuristic for the storage policy in a conventional warehousetopic

Marsh has been working on the same problem but evaluates two alternative policies.

Goetschalckx and Ratli€ evaluate storage policies for block storage through an analytical study.

Batching

Rosenwein analyzes the maximum throughput in a conventional warehouse

Elsayed and Unal derive analytical expressions to evaluate batching algorithms

Elsayed and Stern test 24 batching algorithms with the aid of simulation

Warehouse design problems: Tactical level
In conclusion, many papers at the tactical level concern the performance of, mostly automated, warehousing systems.
Karasawa and Ashayeri analyze the AS/RS
Bozer and White consider end-of-aisle orderpicking systems.
Marnix and Sharp evaluate the performance of several con®gurations of a carousel system
Warehouse design problems: Strategic level
Most publications analyze the performance of a warehouse in order to be able to compare the system with alternative ones.
Oser provides an analysis of an automated transfer car storage
A limited number of publications deal with problems in the second cluster.
Rink and Waibel describe Lasys, a German decision support system for warehouse design
Frazelle and Hackman provide an empirical study concerning the evaluation of warehouses
Yoon and Sharp suggest an elaborate conceptual procedure for the design of an orderpick system
Duve and Bocker propose a step-wise design  method
Ashayeri and Goetschalckx provide a step-wise general design procedure
Warehouse literature overviews
important gaps in the research fieelds existed
most research seemed to concentrate on rather limited problems

Design oriented research

design oriented research
policies cannot be isolated
can at best be partial
are difficult to quantify
can be combined in multiple ways
is often complex
analysis oriented research
the ef€fects can be quantified
can be quantified
easily modelled
alternatives is fully known

Warehouse design

Warehouse performance criteria
Order fulfillment quality
Response time
Storage capacity
Performance
Mixing volume and flexibility
Investment and operating costs
Warehouse design methods
Hierarchical level: - Strategic - Functional - Operational.

Recognize the relationships between problems, to avoid suboptimal solutions

Solutions chosen at a higher level provide the limitations for lower-level design problems.

Warehouse characterizations

Warehouse processes
Shipping area
Orderpicking
The storage process
The receiving process
Warehouse resources
Material handling equipment for preparation
Computer system
Retrieval of items
Storage system
Storage unit
Warehouse organization
Allocation of tasks to personnel and equipment are addressed by operator
Shipping process - orders and trucks are assigned to the docks
Order preparation process - Selection areas
Storage process - particular location for each product
Reception process - Assignment of trucks to the docks
Process flow at the design stage