Customers and Managers will allways ask for 24/7 uptime of the system. Make sure you are realistic. This table may be helpfull.
| Base numbers | Wanted Uptime |
Allowed downtime (hours) per year |
||
|---|---|---|---|---|
| Days per year | 365 | 99.99% | 0.88 | |
| 99.98% | 1.75 | |||
| Hours per day | 24 | 99.97% | 2.63 | |
| Hours per week | 168 | 99.96% | 3.50 | |
| Hours per month | 728 | 99.95% | 4.38 | |
| Hours per year | 8.860 | 99.9% | 8.76 | |
| 99.8% | 17.52 | |||
| Minutes per day | 1.440 | 99.5% | 43.80 | |
| Minutes per week | 10.080 | 99% | 87.60 | |
| Minutes per month | 43.680 | 95% | 438 | |
| Minutes per year | 525.600 | 90% | 876 | |
| 85% | 1.314 | |||
| Seconds per day | 86.400 | 80% | 1.752 | |
| Seconds per week | 604.800 | 75% | 2.190 | |
| Seconds per month | 2.620.800 | 50% | 4.380 | |
| Seconds per year | 31.536.000 | |||