https://www.jeankhawand.com/blog Technical advisor bridging client success and engineering depth — deep debugging, proactive support, and clear communication. en-gb Tue, 16 Jun 2026 21:24:10 GMT https://www.jeankhawand.com/blog/sla-math https://www.jeankhawand.com/blog/sla-math Tue, 16 Jun 2026 00:00:00 GMT A practical look at SLA arithmetic — and why "five nines" sounds better than it is until your outage hits at 4 AM on a Friday. reliability sla fde