2. Obsolescence Cost Calculation

The obsolescence factor is also calculated as a percentage of equipment cost. Equipment costs you know, approximately 900 rupees per hour. For the second year, obsolescence is 0.05, thus obsolescence cost per hour = 0.05 × 900 = 45 rupees.

To calculate obsolescence cost on an hourly basis, you take a percentage (obsolescence factor) and multiply it by the equipment's cost per hour. In this case, with an obsolescence factor of 0.05 (or 5%), the cost is 45 rupees per hour. This incremental cost reflects the inefficiency of using the aging machine compared to newer options that would work with higher productivity.

Imagine you own a vehicle that requires frequent repairs and consumes more fuel as it ages. If you liken each repair cost to obsolescence cost, you can see how the accumulated expenses can add up over time. Choosing a new vehicle that is more fuel-efficient and reliable could save you significant money in the long run.

Now, yearly obsolescence costs for the second year = 45 × 2000 = 90,000 rupees.

To find the total annual obsolescence cost, multiply the hourly obsolescence cost by the number of operating hours in a year. In this scenario, if the obsolescence cost per hour is 45 rupees and the machine operates for 2000 hours a year, the total is calculated as 45 rupees/hour × 2000 hours = 90,000 rupees annually. This shows the economic impact of retaining old equipment over the operational period.

Suppose you take your aging car for repairs frequently, spending about 45 rupees each time, and you use it for 2000 hours a year. By the end of the year, the total repair costs (90,000 rupees) equate to the obsolescence costs associated with keeping that vehicle, revealing how retaining poor-performing assets can lead to ballooning expenses.

Now, similarly, calculate the obsolescence cost for the third year. The obsolescence factor is 0.12. Obsolescence cost per hour = 0.12 × 900 = 108 rupees.

As machines age, their obsolescence cost often increases due to the deterioration in efficiency and an increase in the obsolescence factor. In the third year, the obsolescence factor rises to 0.12, culminating in an hourly cost of 108 rupees. This annual calculation continues in a similar pattern where you determine the cost per hour and multiply it by the usage hours to compute the yearly obsolescence cost.

If you think of your old car needing more frequent repairs and consuming more gas, the increased cost (108 rupees per hour) could equate to your mounting expenses. If you were to keep the car for yet another year, your total yearly costs would rise significantly, reflecting the economic burden of hanging on to an outdated asset instead of investing in a more efficient solution.

Now find the yearly obsolescence cost for the third year: Obsolescence cost per third year = 108 × 2000 = 216,000 rupees.

Following the calculation method, the yearly obsolescence cost for the third year is determined by multiplying the hourly obsolescence cost (108 rupees/hour) by the number of hours the machine operates (2000 hours). This results in a total of 216,000 rupees. This total offers a clear picture of how keeping an old machine is increasingly costly as it depreciates over time.

Consider the total costs of maintaining that old car over three years. Just like how ongoing maintenance (216,000 rupees) accumulates, the obsolescence cost illustrates the escalating expenses of keeping an inefficient machine, reinforcing the importance of evaluating when to replace instead of merely repairing.

You know the cumulative usages for every year it is 2000 hours. Now you can add it, then find the cumulative cost per hour. Cumulative cost per hour is going to be nothing but column 6 divided by column 7.

To arrive at the cumulative obsolescence cost per hour, you divide the total obsolescence costs by the cumulative number of hours the machine has operated. This brings to light the cost efficiency of retaining the machine as replacements become necessary. By tracking this over years, you understand how costs compound and shape overall profitability.

Think of it like tracking your car expenses. If you total up all your repairs and compare it with how often you’ve driven it, you can see if it's worth keeping that car. By calculating cumulative costs per usage hour, you can identify whether the savings of maintaining an old vehicle outweigh the benefits of purchasing a new, better-performing model.

Now, the obsolescence costs are increasing over time. Similarly, your downtime cost also shows an upward trend. The economic life of the machine is determined by minimizing total costs.

Throughout this section, we've illustrated how obsolescence and downtime costs grow together with equipment aging. By closely monitoring these costs year after year, decision-makers can pinpoint the economic life of a machine, signaling when it's time to consider a replacement that offsets growing operational expenses.

Returning to the smartphone analogy, you may start experiencing slowdowns (downtime) and discover frequent software updates (obsolescence costs) bogging down performance. The idea is to preemptively decide to invest in a new smartphone, before costs of maintenance and inefficiency spiral, ensuring you stay on top of technology, ultimately improving overall effectiveness and productivity.

--