2019-04-02 TC Meeting notes

Sebastian Brudziński

Forum post:  https://forum.openlmis.org/t/upgrading-spring-boot/5039

• Start with Template Service should manifest most of the problems in the upgrade

• Double Entry Accounting:
  
  • Usually used in currency / traditional accounting - can be used for other things
  • Easier to reason about
  • Easier to maintain a consistent record
  • Are we considering implementing this?
    • Most push-back comes from stakeholders thinking about anything automatically happening to other facilities - one facility performs an action that automatically effects another.
      • Agreed - don't let other facilities effect one another
      • On accounts being reasons:  Reasons are close to accounts, however a reason set doesn't necessarily come with posting rules.
        • Some reasons might be better modeled as accounts, others would stay reasons.
        • Facility level stakeholders would be introduced to different account views on stock (some UI / UX / reporting elements)
        • Administrator experience: Might ship with some basic accounts at first, as product matures administrator could define posting rules and accounts.
    • Modeling Transportation - e.g. dummy accounts (see below on dummy)
• Technical:
  • Keep stock events (e.g. receipt of stock - explains business event)
  • Posting rules would be different:
    • Double entry accounting would put equal and opposite entries into different accounts. (combined it all equals 0)
    • Transferring stock would have a decrement one side, increment the other.
    • What is an account?
      • Facilities have accounts: 
        • SoH, lending, borrowing, etc
      • Between facilities we can think of account "transfers"
      • External systems:  Their accounts could be modeled as a "dummy" account within OpenLMIS.  This keeps to the sum to 0 posting rule
    • Posting rules:
      • For each event - the posting rule determines how the event is processed.
      • Posting rules can be account specific
      • Posting rules can apply temporally (apply to a specific time range)
  • READ MARTIN FOWLER:  https://martinfowler.com/apsupp/accounting.pdf