Question $2(11$ marks$)$

Risk$-$based decisions are dependent on accurate risk information. Key Risk Indicators are an operational risk management tool$/$methodology which generates risk information. The power outages could negatively influence the company$$s operations, especially regarding system downtime. As such, it is imperative to monitor the effectiveness and efficiency of the system's operations. A lower threshold of $25$ minutes and an upper threshold of $30$ minutes per day were identified. The system downtime for a week was monitored and indicated in the table. Explain the concept of using Key Risk Indicators, determine the time of the system downtime per day and illustrate it by means of a line graph. Indicate which day$($s$)$ the company must ensure that a backup system operates.

System downtime

Day $1$

Day $2$

Day $3$

Day $4$

Day $5$

Day $6$

Day $7$

$09$h$0009$h$05$

$10$h$0010$h$10$

$11$h$0011$h$05$

$09$h$0009$h$15$

$08$h$0008$h$10$

$09$h$0009$h$15$

$10$h$0010$h$05$

$12$h$0012$h$10$

$13$h$0013$h$10$

$12$h$0012$h$10$

$12$h$0012$h$30$

$13$h$0013$h$30$

$12$h$3013$h$00$

$13$h$0013$h$05$

$22$h$0022$h$05$

$16$h$0016$h$05$

$19$h$0019$h$10$

$14$h$0014$h$05$

$17$h$0017$h$05$

$16$h$0016$h$05$

$18$h$0018$h$05$