Final answer:
Rajat should use MTTF (Mean Time To Failure) to assess and identify the expected lifetime of a piece of hardware, enabling efficient planning for future replacements.
Step-by-step explanation:
When Rajat is assessing the susceptibility of his environment to hardware failures and wants to identify the expected lifetime of a piece of hardware, the measure he should use for this is MTTF, which stands for Mean Time To Failure. MTTF is a reliability metric that predicts the average time between non-repairable failures of a technology product. It is important for Rajat because it allows him to estimate the time a new hardware component can be expected to operate before it is likely to fail, aiding in effective planning for replacements and mitigating downtime risks.
MTTF represents the average time a device or system is expected to operate before experiencing a failure. It is a key metric for evaluating the reliability of hardware. The other options refer to different aspects of system reliability and recovery:
MTTR (Mean Time To Repair): The average time it takes to repair a failed component or system.
RTO (Recovery Time Objective): The targeted duration within which a system should be restored after a disruption.
RPO (Recovery Point Objective): The targeted point in time to which data should be recovered after a disruption.
MTO (Mean Time to Obsolescence): The average time until a piece of hardware becomes obsolete.