There are four performance models available to choose when creating or modifying an aircraft model.
The most important thing to keep in mind with any model is to enter the data correctly.
If your aircraft does not fit into either the Constant Altitude or Constant Power categories, or your aircraft Pilot's Operating Handbook (POH) does not include non-standard temperature data, or if you wish to spend a minimum amount of time entering performance data, the Quick Model is your best choice. The Quick Model can be very accurate. This is especially true if more than one weight is entered.
The Constant Altitude and Constant Power models are more complex and require you to enter more performance information, but effectively model the interaction of manifold pressure (if applicable), RPM, and other factors.
If your POH provides Constant Power Performance Charts and performance figures for non-standard (ISA) temperatures, the constant altitude and constant power data entry is relatively easy. Cessna aircraft manuals tend to include Constant Altitude Performance Charts, and most other manufacturers (Beechcraft, Piper, Aerospatiale, and Mooney) tend to use Constant Power Performance Charts. There are exceptions to this, so look through your POH to determine the type of performance charts available to you.
The Advanced Model is available only in the corporate version and allows detailed entry of climb, cruise, and descent tables for turbine aircraft.
You can enter a Turbine as a Quick Model (basic aircraft) or as an Advanced Model (if you purchased the corporate version). A Jet Aircraft should be entered as an Advanced Model for best planning results.