How the 50/50 Rule Guides Sealed-System Diagnostic Workflows in Appliance Repair
https://crankmaster2.gumroad.com/p/beyond-the-50-percent-threshold-lies-true-replacement-economics-for-failing-units
The 50/50 rule states that when an appliance reaches half its expected lifespan and the cost of repair equals or exceeds 50% of its replacement price, a sealed-system diagnostic procedure determines whether recovery-and-charge or component