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Measures Of Warehouse Productivity

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By Martin Murray,

Warehouse productivity is a number of measurements that management will analyze to monitor the performance of their warehouse operations. The basis of many of the measures used in warehouse productivity is based on how much it costs to perform an operation. The study of labor productivity started with the analysis of repetitive operations in a manufacturing environment. Time and motion studies were performed by industrial engineers, who would observe how long line operators took to do certain operations and would then mathematically calculate standard times for operations. The warehouse operations are unlike production as they are not repetitive, but a number of measures have been devised to help measure warehouse productivity.

Benefits Of Labor Measurement

The warehouse operation is not the same as a production line and warehouse staff do not perform the same repetitive tasks each shift. However, they do perform a number of similar tasks over a period of time. To measure the warehouse productivity, the management must apply standard measurements that can be used for operations that occur in the warehouse, for example, perform physical inventory or placing goods in picking area. However in the warehouse there are any numbers of factors that can change the time taken to perform a task. The use of enterprise resource planning (ERP) systems can easily calculate the length of time an operation can take to perform, but a standard measurement must be calculated using a sampling method or time study. Only after the standard measurements are agreed upon can the benefits of any labor measurement can be enjoyed.

The major benefit for warehouse management that is the standards can help when any changes are to be made to warehouse layout changes, loading or shipping dock changes and staff reduction. The standard labor measurement combined with the number of operations performed in the warehouse on any shift or series of shifts can result in an accurate picture of the performance of the warehouse.

Issues With Labor Measurement

There are a number of issues with the use of labor measurement that can bring into question the validity of any analysis of warehouse performance. The standards for labor measurement can change over a period of time. Technological changes, including the warehouse software and hardware, can change standards and therefore the analysis becomes void. The type, size and variety of materials moved in the warehouse may change over time, which could increase or decrease standard measurements. In addition changes to the warehouse layout or process changes could drastically change the standard measurements. It is important to remember that standard labor measurement does fluctuate and if warehouse decisions are based on these measurements, they should be as current as possible and based on the current warehouse operations.

Pre-Engineered Standards

The pre-engineered standards take a normal warehouse operation and reduce it to a number of smaller elements which when combined together make up the complete operation. The elements include all the actual operation components, plus travel, rest, etc., based on the average warehouse operator. The time values that make up an operation are based on methods time measurements which reduce all motion operations down to a time measurement unit (TMU). A single TMU is equivalent to 0.00001 hour. These TMU’s have been developed in since the 1940’s for each movement an operator would make. The Department of Defense (DoD) published a handbook back in 1967 that described the basics for TMU’s called Materials Handling Standard Time Data. It is possible to use the TMU’s to calculate the length of time required for any operation.

Summary

In measuring warehouse productivity the warehouse management does have a number of options to calculate the performance based on sampling, standard operations or time studies. Although all these options have benefits and issues, the measurement should be taken as a guide and performance measured against that guide. In this way the performance of the warehouse can be fairly judged.

Source: http://www.inboundlogistics.com/articles/scperspectives/scperspectives1109.shtml

Post Disclaimer

The information contained in this post is for general information purposes only. The information is provided by Measures Of Warehouse Productivity and while we endeavour to keep the information up to date and correct, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with respect to the website or the information, products, services, or related graphics contained on the post for any purpose. - PT Tapanuli Logistik Cargo

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Pemeliharaan Berbagai Jenis Plafon

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