          02:00  ●  Last backup    ┐
                 │                 │ Data lost
          08:00  ●  It fails       ┤                ┐
                 │                 │ Recovery time  │ Maximum tolerable downtime
                 │                 │                │
                 │                 │                │
                 │                 │                │
                 │                 │                │
                 │                 │                │
                 │                 │                │
Next day, 08:00  ●  Systems back   ┤                │
                 │                 │ Work recovery  │
                 │                 │                │
                 │                 │                │
                 │                 │                │
Next day, 22:00  ●  Working again  ┘                ┘
