Traditional water heater vs tank less water heater
Let Traditional water be alternative A and Tankless water be alternative B.
For both of them I need 4 factors to let the customer compare what is better for him to buy and when he keep it for 5 or 10 years. for example, compare between initial cost, maintenance cost and electricity bill and add one more.
Use excel to create a cashflow
1. alternative description
2. elements that are include in your CFD
3. values ( for those that you have )
4. inflow/outflow and any relationships between the variables