Extract Miscellaneous Fields From The Eligibility Rules
During this step, you extract miscellaneous fields that must be captured on the order in order drive your eligibility rules.
Misc. Field
Where Stored
Why Is It Needed
Date of birth
Person characteristic
Numerous eligibility rules use this field to determine if a customer is a senior citizen
Type of Residence
Premise characteristic
Numerous eligibility rules use this field to qualify a customer for a package
Type of Heat
Premise characteristic
Numerous eligibility rules use this field to qualify a customer for a package
Note: 
Fields explicitly referenced on every order. You'll notice that we didn't list those fields referenced in the eligibility rules that are explicitly referenced on every order (e.g., customer class, state, division, etc.). This is because these types of fields come "for free".