5. Maintenance and Repair Costs

So, basically that is what is this economic life. Economic life means it is a time during which the cost of holding the machine will be minimum. So, beyond the economic life, you can see that there will be increasing costs associated with the machine, either due to increase in the operating costs that is repair and the maintenance costs or increase in downtime costs or increasing obsolescence cost.

Economic life refers to the period when a machine operates efficiently and economically. During this time, the costs relating to its operation, like repairs and maintenance, are at their lowest. Beyond this period, costs tend to rise as the machine ages due to factors like more frequent repairs, downtime when it's not operational, and costs associated with the machine becoming outdated or obsolete. Essentially, understanding economic life helps in deciding when to replace or continue using a machine to avoid unnecessary expenses.

Think of it like a smartphone. When you first buy it, it works perfectly with the latest features, and the costs of maintaining it are low. However, over a few years, as it slows down and requires repairs, you may realize that upgrading to a new model could save you money in the long run.

In this example, we are going to see how to estimate the economic life of the machine. We are going to estimate economic life for a track mounted front shovel. The purchase price is 35,00,000. The machine is expected to last for 8 useful years, and the depreciation is assumed to follow double declining balance method.

Here we estimate the economic life of a specific machine, a track-mounted front shovel, which was purchased for 3,500,000. This machine is expected to be useful for 8 years. The double declining balance method is used for depreciation, which means the machine's value will decrease more in the earlier years compared to later years. Understanding depreciation helps in assessing how much value the machine loses each year, which is crucial for analyzing whether to keep or replace it.

Consider a new car as an analogy. It loses most of its value in the first few years (like using the double declining balance method for depreciation). After a few years, the rate at which it loses value slows down. Thus, knowing this helps car owners decide when it might be best to sell and buy a new car.

We also have to consider the annual increase of the average cost of the equipment is approximately 6%. That means the machine cost is going to increase by 2,10,000 every year due to the effect of inflation.

In addition to depreciation, it’s important to account for inflation, which impacts the cost of equipment. In this example, the cost rises by 210,000 each year, which needs to be factored into any analysis related to replacement. This increase diminishes the cost-effectiveness of keeping an old machine over time, as newer alternatives might be more economically viable.

Imagine pricing groceries—over time, bread and milk cost more due to inflation. If you keep buying old groceries, you're paying more without necessarily getting more value. Similarly, machines increasingly cost more to operate due to inflation, suggesting that replacing them could be a better investment.

For calculating the hourly maintenance and the repair cost, downtime cost and the obsolescence cost of the machine, we have to use the following values, and the equipment cost is given approximately as rupees 900 per hour.

To calculate ongoing costs, one must consider hourly rates for maintenance and repair. Here, it is noted that operating costs (including maintenance, downtime, and obsolescence) are higher with an older machine. Understanding how these costs accumulate over time is essential in determining whether to repair or replace the equipment.

Consider owning a home. You may spend more on repairs as time goes on, like fixing leaky pipes or the roof. Eventually, it may become more economical to buy a new home instead of pouring money into repairs for an old one.

Downtime is nothing but the non-availability of your machine for productive work. This time spent in repairs is referred to as downtime, which increases with the age of the machine.

Downtime significantly impacts operational efficiency and costs. If a machine frequently breaks down and needs repairs, it cannot work during those periods, leading to lost production and income opportunities. This aspect becomes crucial in replacement decisions, as more downtime can increase costs and reduce profit margins.

Think of it like a restaurant running out of food or having a broken oven. If the kitchen is down for repairs, no meals can be served, leading to lost sales and unhappy customers. Just like the restaurant, a machine with extensive downtime fails to meet the operational demands of a business.

Obsolescence is another key factor, which increases with the age of the machine, due to various reasons like technological advancements or market changes.

Obsolescence occurs when a machine becomes outdated due to new technology or changing market demands. Understanding this cost is important because as time goes on, the machine may not only perform poorer but may also result in losing business to competitors who have newer, more advanced equipment.

Consider a smartphone once again. Every year, companies release better models. If you are still using an old model, not only does it perform worse, but you may find your friends choosing newer models with features you wish you had, making yours seem outdated.

Now let us work out the cost associated with the machine from the replacement analysis perspective. It includes depreciation and the replacement cost associated with this machine.

For a thorough replacement analysis, one must not only calculate depreciation but also actually add inflation costs over the years. This helps evaluate whether replacing the machine will save money in the long run or if it is wiser to keep the old machine for some time longer.

It's like deciding whether to trade in your old car for a new one. You assess how much your current car is worth while considering how much you'll spend on repairs and how much more a new car will cost you initially, helping determine if and when it's the right move to make that change.

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