| Categories and variables | Important elements | |
| Static list variables | Alternative_Bus | Ask the user about your overall Fleet Infrastructure. |
| Air_Polution | Some buses produce more air pollution than others. Would you object to a bus that is less environmentally clean (contribute to air pollution)? | |
| Capability | Some buses are more capable than others. Would you object to a bus that is less capable (cruising distance, slope climbing and average speed)? | |
| Comfort | Some buses are more comfortable than others. Would you object to a bus that is less comfortable (user attention to accessories-i.e. air-conditioning, automatic door, etc.)? | |
| Maintenance | Some buses are more costly to maintain than others. Would you object to a bus that is more costly to maintain? | |
| Noise | Some buses produce more noise than others. Would you object to a bus that is less quiet? | |
| NRG_Available | Some organizations have more energy availability than others. Would you say your organization’s energy availability (supply, storage and cost of storage) is? | |
| Safety | Some buses provide better safety than others. Would you object to a bus that is less safe (fuel handling properties compared to conventional diesel)? | |
| NRG_Efficient | Some buses are more energy efficient than others. Would you object to a bus that is less energy efficient? | |
| NRG_Independence | Some organizations have more energy independence than others. Would you say your organization’s energy independence (resilience to pricing fluctuations) is? | |
| NRG_Infrastructure | Some buses require more capital infrastructure than others. Would you object to a bus that requires more capital infrastructure (refueling stations and depot modification)? | |
| Purpose | This potential bus purpose is intended. | |
| Reliability | Some buses are more reliable than others. Would you object to a bus that is less reliable (on-road breakdown or roadcalls)? | |
| Maintenance | I need to know about your overall Fleet Economic Needs. | |
| Serviceability | Some buses require more service than others. Would you object to a bus that is less serviceable (Preventative maintenance to prevent roadcalls)? | |
| State_Funds | Of your overall funding, what percentage of state funds is? | |
| Numeric variables | Active_Bus | What is the total number of active buses in your fleet? |
| Bus_Age | What is the average age of buses in your fleet? | |
| Alternative_Bus | What percentage of your buses that are 50 passengers or greater are alternative fuel buses? | |
| Alternative_Fuel | What is the current percentage of alternative fuel buses in your fleet? | |
|
| Bus_Size | What percentage of your buses are 40 passenger or greater? |
|
| Other | Other Funds |
|
| Price | What is the current price of gasoline per gallon? |
|
| Ridership | What is the average ridership of buses in your fleet? |
| Confidence Variables | BD | Recommendation score for biodiesel bus system |
| CNG | Recommendation score for compressed natural gas bus system | |
| HDE | Recommendation score for hybrid diesel-electric bus system | |
| ULSD | Recommendation score for ultra low sulfur diesel bus system | |