Disponibilidade %
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The System Availability Calculator is an essential tool for evaluating the reliability and performance of complex systems. It calculates the percentage of time a system is available for use, considering the mean time between failures (MTBF) and the mean time to repair (MTTR).
The formula used is simple yet effective: MTBF divided by the sum of MTBF and MTTR. This provides a clear view of system efficiency and helps identify areas for improvement. Availability is crucial in various areas, such as information technology, engineering, and infrastructure management.
When using this calculator, it's essential to consider real-world cases where system availability is critical, such as in production environments, cloud services, and critical systems. Additionally, care must be taken with the accuracy of input data, as it directly affects the result's precision.
Understanding system availability helps prevent productivity and revenue losses, as well as improves user experience. It's a valuable metric for any organization that relies on complex systems to operate.
Frequently asked questions
What is MTBF and MTTR?
MTBF is the mean time between failures and MTTR is the mean time to repair. These values are essential to calculate system availability.
Why is system availability important?
System availability is crucial to ensure productivity, prevent revenue losses, and improve user experience.
How to improve system availability?
Improving availability involves increasing MTBF (reducing failures) and decreasing MTTR (quick repairs). Preventive maintenance and contingency plans help.
Does the calculator consider other factors besides MTBF and MTTR?
No, the calculator focuses on MTBF and MTTR. Other factors may influence availability, but these are the main ones for the calculation.
How to interpret the calculator's result?
The result is a percentage indicating system availability. The closer to 100%, the more available the system is.