Warehouse management system
Warehouse management system
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Warehouse management system

A warehouse management system (WMS) is a set of policies and processes intended to organise the work of a warehouse or distribution centre, and ensure that such a facility can operate efficiently and meet its objectives. The core function of a warehouse management system is to record the arrival and departure of inventory. Software which fulfils this function can offer features like recording the precise location of stock within the warehouse, optimising the use of available space, or coordinating tasks for maximum efficiency.

In the 20th century, the term 'warehouse management information system' was often used to distinguish software that fulfils this function from theoretical systems. Some smaller facilities may use spreadsheets or physical media like pen and paper to document their processes and activities, and this too can be considered a WMS. However, in contemporary usage, the term overwhelmingly refers to computer systems.

More complex warehouse management systems tend to include specialised features designed for specific industries or types of facility, while legacy enterprise software vendors aim to offer as many of these features as possible in a ‘one-size-fits-all’ solution, which may be available as modules.

Academic research has made use of an approximate classification system based on 3 levels of complexity:

A WMS can either be hosted locally or installed on the cloud, allowing the WMS to be accessed from anywhere online.[citation needed] Local WMS software has historically been offered through a perpetual licence, giving organisations the permanent right to install it on their own on-premises servers, typically alongside a fixed period of updates and technical support which may be renewed at additional cost. As with many types of enterprise software, this provision model is gradually being replaced by hosted subscription services. Legacy enterprise software vendors typically offer both models, but incentivise their customers to move to the cloud.

A WMS may be a standalone product, or can be a module or category of modules within a larger Enterprise Resource Planning (ERP) system, Shipping or Inventory Management Software, or Supply Chain Management System (SCMS). There may be surcharges when adding agencies or workers. Installation type does not affect the level of functionality that may be achieved by a WMS, so long as sufficient computing power is provisioned and data is successfully synchronised with other systems.

Inventory Management Software is used in many industries, such as manufacturing, retail and hospitality. Like warehouse management systems, its foundational feature is tracking stock levels of different materials. These two types of software begin to differ at more advanced levels. For example, a service business with a relatively simple ‘warehouse’ or storeroom is more likely to require features that analyse the cost of materials it consumes, or the optimal moment to purchase additional stock, rather than complex WMS features that focus on efficient movement of material within the warehouse itself.

Many Enterprise Resource Planning systems include a warehouse management module or set of modules. The core logic of an ERP system is transactional in nature; its purpose is to connect operational and commercial data to accounting and financial decision-making. As a result, its warehouse modules tend to focus on the metrics that are immediately and obviously relevant from a financial point of view, and tend to lack the sophistication of advanced WMS's.

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