What is Human-Life Approach 

The human-life approach is a method of calculating the amount of life insurance a family will need that is based on the financial loss the family would incur if the insured person were to pass away today. It is usually calculated by taking into account a number of factors, including, but not limited to, the insured individual's age, gender, planned retirement age, occupation, annual wage, employment benefits, as well as the personal and financial information of the spouse and/or dependent children.
Since the value of a human life has economic value only in its relation to other lives, such as a spouse or dependent children, this method is typically only used for families with working family members. The human-life approach contrasts the needs approach.
The needs approach is one of the most accurate methods to determine the amount of life insurance to own. It takes into account all the present and future family needs and calculates directly the amount necessary to meet those needs. 
To estimate how much life insurance you need using the needs approach, you should add up all current and potential expenses and then subtract the total amount of existing assets from it.
Whole life insurance, or whole of life assurance (in the Commonwealth of Nations), sometimes called "straight life" or "ordinary life," is a life insurance policy which is guaranteed to remain in force for the insured's entire lifetime, provided required premiums are paid, or to the maturity date.