Application Reliability Engineering

Revenue-Weighted Availability

99.971%

P99 Latency (Checkout)

1,240ms

+18% vs prior

Error Budget Remaining

62.4%

Deployment Failure Rate

4.2%

MTTR Sev-1

22 min

Cost per 1K Txn

$0.87

+11% MoM

P99 vs P50 Latency — Critical Services (30d)

Error Budget Burn Rate by Service

Deployment Success Rate (30d rolling)

Apdex Score by User Segment

MTTR by Severity Level

Resource Saturation Index

Infrastructure Cost per 1K Transactions

Dependency Health Matrix

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Stripe API

SendGrid

Auth0

AWS S3

DataDog

Healthy (95-100)

Good (85-94)

Warning (75-84)

Critical (<75)

Recent Incidents & Impact

Date	Severity	Service	Description	MTTR	Impact
Dec 18	SEV-1	Checkout API	Connection pool exhaustion	18 min	$42K revenue
Dec 15	SEV-2	Auth Service	Auth0 latency spike	64 min	12K users
Dec 12	SEV-2	Notification	SendGrid rate limit	112 min	28K users
Dec 08	SEV-3	Analytics	Dashboard timeout	45 min	2K users
Dec 05	SEV-1	Database	Primary replica failover	28 min	$78K revenue
Dec 02	SEV-2	Search API	Elasticsearch memory pressure	92 min	18K users
Nov 28	SEV-3	CDN	Cache invalidation delay	34 min	5K users
Nov 24	SEV-2	Payment	Stripe webhook timeout	56 min	8K txns