In the early days of World of Warcraft, Blizzard lacked sophisticated tools to measure maximum player damage output, forcing developers to rely on a more manual approach to design raid encounters. According to former WoW designer Wyatt Cheng, this meant enlisting "strongest sickos" within the company to grind target dummies to establish performance benchmarks.
Cheng detailed the process for designing Patchwerk, a boss introduced in the Naxxramas raid in June 2006. The encounter was inspired by a desire for a boss that tested fundamental player roles: tanking, healing, and damage per second (DPS). Initially, Patchwerk was designed to alternate attacks between main and off-tanks, but this led raid groups to stack healers and slowly chip away at the boss's health.
To counter this, Blizzard implemented an enrage timer, a mechanic that forces players to defeat a boss within a set time limit or face lethal damage. This mechanic served as an explicit DPS check for the Patchwerk encounter.
However, determining an appropriate enrage timer required knowledge of what players could realistically achieve in terms of damage. "Back in those days, there just wasn't robust data on how much DPS a player could realistically put out," Cheng explained. This was before the advent of community tools like World of Logs, which later became a standard for analyzing player performance.
Without this data, Blizzard resorted to internal testing. Cheng stated that top players within Blizzard were tasked with testing each class against target dummies to maximize their damage. To further account for the ingenuity of serious raiders in pushing game limits, Blizzard then inflated Patchwerk's health by an additional 30% as a safety measure.
This approach appears to have been effective, as player accounts from 2006 describe Patchwerk as a demanding "mathematical gearcheck." The encounter was challenging for raids lacking adequate gear or DPS but was otherwise straightforward for those who could meet the required performance levels. The design philosophy, while rudimentary by today's standards, proved successful in creating a memorable and challenging raid boss for vanilla World of Warcraft.