Understanding the Machine Hour Rate Method

The Machine hour rate method is a technique used in cost accounting to absorb factory overheads into production costs. It is particularly useful in industries where machines are the primary factor of production. This method calculates an overhead rate per hour of machine usage, which is then applied to jobs or products based on how long they utilize a specific machine or group of machines.

Role of a Machine Under Machine Hour Rate

Under the Machine hour rate method, a machine is treated as a specific location or division where costs are incurred and accumulated. This concept aligns precisely with the definition of a cost centre.

• A cost centre is a location, function, or item of equipment for which costs may be ascertained and used for the purposes of cost control.
• When using the Machine hour rate method, all overhead costs related to operating that specific machine (such as depreciation, power, maintenance, rent of the machine space, etc.) are collected and allocated to that machine.
• These accumulated costs for the machine (the cost centre) are then divided by the estimated working hours of the machine to arrive at the Machine hour rate.
• This rate is then applied to the actual machine hours consumed by each product or job.

Therefore, the machine functions as the unit for accumulating and distributing these machine-related overhead costs, making it a cost centre.

Analysing the Options

• Cost unit: A cost unit is a unit of product, service, or time in relation to which costs may be ascertained or expressed. Examples include per unit, per ton, per hour (of labour), etc. The machine itself is not the product or service being costed; it is the means of production.
• A cost centre: As explained above, this fits the description perfectly. The machine is a specific area or piece of equipment where costs are gathered before being allocated to cost units.
• Service Department: A service department is a department that provides services to other production or service departments within the factory (e.g., maintenance, power house, stores). While a machine might be in a production department, treating it individually under the Machine hour rate focuses on the machine as the point of cost accumulation, not as a service provider to other departments.
• None of these: This is incorrect because "A cost centre" is a valid description.

In summary, the fundamental principle of the Machine hour rate method relies on treating the machine as a distinct entity for cost collection and allocation purposes, which is the role of a cost centre in cost accounting. This method helps in accurate overhead absorption in machine-intensive environments.