anchor.diff:  Price List:: One or more plans that have discount/special pricing. Price lists are defined in the <<Catalog,catalog>>.
   Along with price lists, you define <<Rules,catalog rules>> that specify which price list to use if a customer changes plans.
   
  +Pricing Tiers
  +Also known as "tiered pricing" or "price tiers."
  +{A common subscription and usage charge model where pricing changes are based on the incremental number of units that are purchased. For example, 1-5 users are charged full price and 5-10 users receive discounted pricing. A customer purchases 7 units. Units 6 and 7 are discounted, and the first 5 units are charged at the full price.}
  +
   [[Product]]Product:: A product or service that the customer can purchase (or rent/lease). A product can be associated with multiple <<Plans,plans>>, each plan specifying different ways the product can be purchased (e.g., a monthly plan and an annual plan).
  +
  +Proration
  +{Adjusting a customer's bill amount to reflect any plan changes made in the middle of a billing cycle.}
   
   == Q
   
   == R
  +
  +Refund
  +
  +{A refund returns money to a customer - as opposed to a credit, which creates a customer credit balance that may be applied to reduce the amount owed to you. For instance, refunds are used when a customer cancels service and is no longer your customer. Refunds can also represent processed payments that are reversed, such as a chargeback or a direct debit payment reversal.}
   
   [[Rules]]Rules:: The rules that determine how Kill Bill should behave when a plan is created, cancelled or changed. Also known as "catalog rules."
   
  
positive.code: 
  [[Subscription]]Subscription:: A contract between your organization and a customer to purchase a particular product/service with particular terms. Kill Bill associates a subscription with a <<Plan,plan>>, an <<Account,account>>, and a start date.
  
  Subscription bundle:: See <<Bundle>>
  
  == T
  
  
negative.code: 
  Downgrade:: The change of a subscription from one plan to another plan of lesser dollar value.
  
  {A downgrade is a change order or amendment to an existing contract or subscription in which a customer chooses a lower service level. A downgrade can be a less expensive service offering, or a smaller quantity or users or usage levels. Depending on business rules, this change can result in a prorated credit of the original service or a penalty fee associated with the change.}
  
  Dunning
  {The process of handling failed payments and declined credit cards to recover lost revenue.}
  
  Duration:: Defines the length of time for a <<Phase,phase>>. Kill Bill supports durations of days, months, years or unlimited.
  
  == E
  
  Evergreen Phase:: A type of <<Phase,phase>> in which no end date is specified and Kill Bill continually bills the account for the subscription until the customer cancels it. A evergreen phase is specified as part of a <<Plan,plan>> within the <<Catalog,catalog>>.
  
  External Key:: An alternative unique ID for an object, which you can use to map the object with an external resource. For example, you could define an external key for a specific customer account, which is the same as the identifier  used in your CRM system.
  
  