and people try to obtain the thing that is wanted or needed most by trading-off things that are wanted or needed less

This concept is often referred to as "opportunity cost." Opportunity cost is the value of the next best alternative that is foregone when a choice is made. In other words, it is what a person gives up in order to obtain something else.

For example, if someone wants to purchase a new car, they may have to trade-off other things they want or need less, such as going on vacations, buying luxury items, or saving money for other purposes. By making this trade-off, they are prioritizing their need for a car over other options.

Similarly, in everyday decision-making, people are constantly evaluating the trade-offs between different options and determining which one aligns best with their desired outcome or need. It could be as simple as choosing between going to a party or studying for an exam, or as complex as deciding between pursuing a career that offers high salary but limited work-life balance versus a lower-paying job with more flexibility.

Overall, the principle of trading-off is a fundamental aspect of decision-making, as individuals allocate their limited resources (time, money, energy) to the most important or desired outcomes, while sacrificing or giving up other options.

The process you are referring to is known as "economic trade-off" or "opportunity cost." It is a fundamental concept in economics that describes how individuals, businesses, and governments make choices when faced with limited resources and competing needs or wants.

Here's a step-by-step breakdown of how economic trade-offs work:

1. Identify the desired goal or item: The first step is to determine the most important thing that someone wants or needs. This can vary greatly depending on the individual or situation. For example, it could be a person wanting to buy a new car, a company deciding whether to invest in research and development, or a government trying to allocate funds for public welfare.

2. Evaluate alternative choices: Once the desired goal is established, the next step is to consider different alternatives. These alternatives represent different ways of achieving the desired outcome or fulfilling the need. For instance, if someone wants to buy a new car, they might consider various options such as buying a used car, leasing a car, or using public transportation.

3. Assess the costs and benefits: Each alternative comes with its own set of costs and benefits. Costs can include monetary expenses, time commitments, effort, or any other resources that need to be allocated. Benefits represent the value or satisfaction gained from each alternative. It's essential to weigh these costs and benefits against each other when making decisions.

4. Determine opportunity cost: Opportunity cost refers to the value of the next best alternative forgone when making a choice. In other words, it's the value of what you give up in order to obtain something else. To determine the opportunity cost, you need to compare the benefits and costs of each alternative and identify the one with the highest value that must be foregone.

5. Make a decision: Taking into account the opportunity cost, individuals or entities can make an informed decision based on their priorities. They will select the alternative that provides the greatest benefit or satisfaction given the resources available.

Overall, economic trade-offs involve prioritizing and making choices based on the relative importance of different wants or needs. By evaluating the costs and benefits of different alternatives and identifying opportunity costs, individuals and entities can make rational decisions and allocate resources most effectively.