Final answer:
To determine which strategy to adopt, we compare the present worth of the two alternatives. At an interest rate of 12% per year, the present worth of the single-user license is approximately $14,835, while the present worth of the site license is $15,000. The site license is the more cost-effective option.
Step-by-step explanation:
To determine which strategy to adopt, we need to compare the present worth of the two alternatives. The first alternative is to buy one single-user license now for $4000 per year for 4 years, providing 5 years of service. The second alternative is to buy a site license now for $15000.
At an interest rate of 12% per year, we can calculate the present worth of each alternative by discounting the future cash flows to the present. The present worth of the first alternative is $4000 + ($4000/1.12) + ($4000/1.12-2) + ($4000/1.12-3) + ($4000/1.12-4), which is approximately $14,835. The present worth of the second alternative is simply the initial cost of $15,000.
Based on the present worth evaluation, the second strategy of buying a site license now is more cost-effective, as it has a lower present worth compared to the first strategy. Therefore, I would suggest opting for the site license.