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Can you analyse the cost behaviour between in-house and outsourced equipment maintenance?

Can you analyse the cost behaviour between in-house and outsourced equipment maintenance?


The company in question is a JV of India’s leading oil marketing and gas distribution companies. The company’s product portfolio includes Compressed Natural Gas (CNG), catering to more than ~14 Lacs CNG vehicles and Piped Natural Gas (PNG), catering to more than ~21 Lacs domestic PNG customers.


Compressors and dispensers are the principal equipment used in a CNG station for filling CNG in vehicle tanks. The operational costs of these types of equipment are primarily maintenance-related. Therefore, the company in question needs assistance in designing a framework for strategic decision-making to enable accurate gauging of maintenance costs of in–house vs. outsourced compressors and dispensers.

In addition, given the company’s huge customer base, the availability of stations during working hours is paramount. This renders the correct computation of costs a challenging process compounded by the additional burden of resource requirements during the maintenance of compressors and dispensers.


To evaluate the cost of maintenance, the compressors and dispensers are initially categorised into in–house and outsourced categories. These outsourced compressors/ dispensers are further subcategorised into AMC (machines under warranty) and CAMC (after the machines’ warranty has expired).

The costs so ascertained are then allocated to the different makes/ models of the compressors/dispensers based on capacity, which is the most reasonable and scientific basis, using the cause-and-effect principle in accordance with the relevant Cost Accounting Standards issued by the Institute of Cost Accountants of India. This trend analysis was performed and studied on three years of cost data. Identification of cost elements and the cost computation of compressors/ dispensers’ category

specific are as follows:

Cost Elements

Cost Computation

In–house maintenance