INVEST is an acronym that stands for Independent, Negotiable, Valuable, Estimable, Small, and Testable12.It is a set of criteria used to assess the quality of a user story in Agile methodologies12. Here's what each term means:

Independent:The user story should be self-contained, in a way that there is no inherent dependency on another user story12.

Negotiable:User stories, up until they are part of an iteration, can always be changed and rewritten12.

Valuable:A user story must deliver value to the end user12.

Estimable:You must always be able to estimate the size of a user story12.

Small:User stories should not be so big as to become impossible to plan/task/prioritize with a certain level of certainty12.

Testable:The user story or its related description must provide the necessary information to make test development possible12.Reference:12

https://blog.logrocket.com/product-management/writing-meaningful-user-stories-invest-principle/

https://blog.logrocket.com/product-management/writing-meaningful-user-stories-invest-principle/

Order Product: The status of the Order Product is updated when the corresponding Invoice Line is posted.The fields such as 'Invoice Run Processing Status', 'Next Billing Date', 'Next Charge Date', and 'Last Charge To Date' are updated for the next period1.

Invoice Line: The Invoice Line object is updated when an invoice is posted.This includes locking the Invoice Line from further changes and finalizing the agreement represented by the invoice2.

Invoice: The Invoice object itself is updated when an invoice is posted.This includes changing the status of the invoice from 'Draft' to 'Posted', which locks the invoice from further changes and makes it ready for revenue recognition reporting2.

It's important to note that posting an invoice finalizes the agreement and prevents deletion of the invoice or any of its invoice lines.This ensures that your organization always has a record for legal and bookkeeping purposes2.

Posting Invoices - Salesforce

Best Practices to Implement Invoice Runs With Salesforce Billing

Unable to Post an Invoice that is in Draft Status - Salesforce

Cancel or Post Invoice Lines in Draft status while Invoice ... - Salesforce

For a Revenue Cloud project where a product's taxability depends on a custom field that holds industry information, the appropriate solution is to use automation to set the Tax Rule based on the value of the custom field. This approach allows for dynamic application of tax rules to products based on industry-specific requirements, ensuring that the correct tax treatment is applied during the quoting and invoicing processes. Automation could involve using Process Builder, Flow, or Apex to update the tax rule assignments on products or quote lines based on the specified industry criteria. This ensures that products are taxed correctly according to the industry-specific regulations captured in the custom field.

To implement the user story of rewarding loyal customers with bulk discounts based on previously purchased quantities, the design of the solution should include the following components:

Contracts, Subscriptions and Assets should be populated with historical data. This is necessary to track the customer's purchase history and determine the appropriate discount tier for each product or service. Contracts, Subscriptions and Assets are the core objects of Revenue Cloud that store the information about the customer's agreements, recurring charges, and entitlements. By migrating the historical data from the legacy system to these objects, the customer can leverage the Revenue Cloud features such as renewal management, usage-based pricing, and revenue recognition.123

Discount schedules with Cross Orders checked. This is the feature that enables the bulk discounts based on previously purchased quantities. A discount schedule is a set of discount tiers that apply to a product or a product option based on the quantity or amount ordered. By checking the Cross Orders option, the discount schedule will consider the quantities from all the orders associated with the same account, contract, or subscription. This way, the customer can reward their loyal customers with lower prices for higher volumes.45

1: Revenue Management Platform & CPQ Solution - Salesforce.com US

2: Salesforce Introduces Revenue Cloud to Help Businesses Accelerate Revenue Growth Across Any Channel - Salesforce

3: Give Discounts for Long Subscriptions Unit | Salesforce Trailhead

4: Discount Schedules - Salesforce

5: Salesforce Revenue Cloud Trailmix - Trailhead

The correct sequence of evaluation events for a price rule, quote calculator plugin (QCP), and CPQ package pricing engine is as follows:

Internal Initialization:This is the first step where the system prepares for the calculation process.

On Initialization:At this stage, any price rules that are set to trigger 'On Initialization' are run.

Calculate Formulas:The system evaluates formula fields.

Before Calculate:Any price rules that are set to trigger 'Before Calculate' are run.

Calculate Quantities:The system calculates quantities, for example, bundle components.

On Calculate:Any price rules that are set to trigger 'On Calculate' are run.

Price Waterfall Calculation:The system calculates out-of-the-box pricing tools such as block pricing, discount schedules, etc.

After Calculate:Any price rules that are set to trigger 'After Calculate' are run1.

This sequence ensures that all calculations and price rules are applied in the correct order, providing accurate pricing information1.Reference:

https://help.salesforce.com/s/articleView?id=sf.cpq_price_rule_considerations.htm&language=en_US&type=5

https://help.salesforce.com/s/articleView?id=000388745&language=en_US&type=1