What are the three metrics that affect operational availability?

These are reliability, maintainability, and supportability. Every effort should be made to explicitly consider each element of the Ao metric throughout the system life cycle.

What is availability operations management?

Availability, by definition, is expressed as the percentage of actual operation time that the equipment is used out of the total time being observed.

What is the difference between operational availability and materiel availability?

Whereas Ao is an operational measure, Am is more of a programmatic measure that covers a much larger timeframe, additional sources of downtime, and additional sources of unscheduled maintenance. Materiel availability is a new Department of Defense KPP implemented through a mandatory Life Cycle Sustainment Metric.

How do you calculate available availability?

Availability = Uptime ÷ (Uptime + downtime) For example, let’s say you’re trying to calculate the availability of a critical production asset. That asset ran for 200 hours in a single month.

What are the three basic approaches to define and quantity availability?

Availability Classifications Instantaneous (or Point) Availability. Average Uptime Availability (or Mean Availability)

How is operational reliability measured?

MTBF is a basic measure of an asset’s reliability. It is calculated by dividing the total operating time of the asset by the number of failures over a given period of time. Taking the example of the AHU above, the calculation to determine MTBF is: 3,600 hours divided by 12 failures.

What does operational availability depend on?

Operational availability is a measure of the “real” average availability over a period of time and includes all experienced sources of downtime, such as administrative downtime, logistic downtime, etc. It is essentially the a posteriori availability based on actual events that happened to the system.

What is materiel reliability?

Materiel Reliability is a measure of the probability that the system will perform without failure over a specific interval. Reliability must be sufficient to support the warfighting capability needed.

In which phase does the LCL refine the support concept and strategy?

During the MSA Phase, the PM (or LCL if a program office has not yet been initiated), develops a sustainment strategy based on the results of the AoA and trade studies, and recommends refinements to Warfighter requirements and sustainment metrics.

How do you calculate operational reliability?

What does 99.99 availability correspond to?

Percentage calculation

Availability %	Downtime per year	Downtime per month
99.9% (“three nines”)	8.77 hours	43.83 minutes
99.95% (“three and a half nines”)	4.38 hours	21.92 minutes
99.99% (“four nines”)	52.60 minutes	4.38 minutes
99.995% (“four and a half nines”)	26.30 minutes	2.19 minutes