TY JOUR TI DevOps as a Financial Practice: Cost of Downtime and Release Speed KW DevOps KW DORA KW SLO KW SLA KW MTTR KW cost of downtime KW cost of delay KW WSJF KW error budget KW feature flags KW canary releases KW blue-green KW observability KW FinOps KW show/charge-back KW platform layer JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Afanas'ev, D.A. PY 2025 IS 0 PB ITBO University