The author's invoicing was incorrectly calculated for three clients. The issue started on UTC-5 23-07-07 16:52 and was reactively discovered 22 days (TTD) later by one of the clients, who noticed that his invoicing included charges for authors that should not have been billed, and reported it through the engagement manager. The problem was resolved in 9.7 days (TTF) resulting in a total impact of 1 month (TTR).
The engineering team was performing refactoring to improve the accuracy of the authors' calculations [1]. Part of this work was to migrate the fa-hashes that identify the unique authors from the old to the improved form. This step took longer than expected, and at the time of calculating, authors had for the same authors fa-hashes with both the old and improved form, so they were double counted.
Fluid Attacks technical representatives met with affected customers to correct the author count by removing all duplicates.
A delay in the migration caused a calculation error in the fa-hash field, which should be unique, so every fa-hash that looked different was counted as an increment. INCOMPLETE_PERSPECTIVE