Udi Dahan

@udidahan.com

1874 Followers 161 Following

Posts about Software Development, Design, and Architecture. Founder and CEO of NServiceBus. He/Him. https://udidahan.com/ https://twitter.com/UdiDahan https://hachyderm.io/@udidahan

Layered architecture diagram with User Interface, Business Logic, and Database layers - and colored vertical bars overlaid representing cross-functional services.

Rules – not invariants
Employees can’t take more annual leave than they have.
… unless their manager approves.
… but that’s only up to 2 days.
… unless their manager is a VP, and then it’s up to 5 days.
… and that negative balance will be deducted from next year’s leave.
… Oh, and if the employee leaves the company before then, then the value of those negative days will be deducted from their final paycheck.

Spreadsheet with two columns - Breadth of use and Staffing level.
Going from "extra small" breadth of use with 1 person part time as a staffing level, through "medium" breadth of use with 2 to 4 full time and/or 6 to 10 part time staff, up to "extra large" with 40 to 100 full time staff.