What Is The True Meaning Behind Maintainability

For example, a more maintainable product lowers maintenance time and operating costs. Furthermore, more efficient maintenance means a faster return to operation or service, decreasing downtime. The key to achieving this objective is to follow best practices in regard to asset reliability and maintainability. Maintainability, or “ease of maintenance”, can be monitored through metrics such as mean time to repair and maintenance cost per replacement asset value. It is the average time required to perform corrective maintenance on all of the removable items in a product or system.

Figure 1-1 shows three examples of unit size quality profiles (print readers can view full-color figures for this and the other quality profiles that follow in our repository for this book). If a buggy application release can be quickly fixed by rolling back to a stable version, the application would have a high degree of maintainability. definition of maintainability On the other hand, if you have a server that needs to be rebuilt manually after it fails, it’s not very maintainable. Now, if the maintenance level decided during the design stage is kept constant throughout its useful life, it will likely result in over or under maintenance of the locomotive at different stages of its life cycle.

definition of maintainability

Duplication of source code should be avoided at all times, since changes will need to be made in each copy. In order to be reliable, a system requires both availability and maintainability. It’s also unlikely to be highly reliable if it takes a long time to fix issues due to low maintainability. The simplest way to spell out the differences between availability, maintainability and reliability is to highlight what’s unique about each concept.

Translations for maintainability

Equipment-specific historical records and maintenance instructions can be made readily available using the equipment tagging system which helps maintenance personnel identify the right asset during on-field activities. It was mentioned in the previous section that monitoring systems are installed on machinery for fault detection. This wastage of time and resources can be easily avoided by incorporating design features that limit the influence of human factors, make the issue obvious, and consequently simplify the necessary corrective maintenance. Whenever an asset is not performing its desired function, this faulty condition of the asset should be obvious to the operator in real-time, so that the required maintenance task can be planned and undertaken before a catastrophic failure occurs.

  • Maintainability is the speed and ease with which the asset can be put back into service when it experiences a failure.
  • Fast enhancements mean shorter time-to-market of new products and services supported by the system.
  • Furthermore, more efficient maintenance means a faster return to operation or service, decreasing downtime.
  • Using equipment and assets that can be repaired quickly and put back into service is a key indicator of efficiency in the manufacturing sector.
  • Reactive maintenance and repeated corrective maintenance on a perpetually failing asset is no way to do business.
  • Asset condition monitoring is a well-known and proven technique for reducing the P-F interval of the asset.
  • The second chart in Figure 1-1 shows the quality profile of a 2-star system.

Here again, this is a somewhat subjective metric, because performance requirements may vary from one user to another. Nonetheless, reliability is the most effective means of measuring whether a system meets the performance levels it needs to, even if those requirements change over time. Unlike maintainability and reliability, availability is an essentially binary metric, in the sense that a system is either available or it’s not. Although availability status can change over time, there is no such thing as varying degrees of availability.

To maintain shareholder support through the 2023 proxy season and beyond, companies and boards of directors will have to find ways to effectively communicate both their commitment to ESG and their strategies for achieving their ESG goals. They have always maintained high standards of professional conduct. The organization should try to stick with the same types of equipment and tools to minimize the need for additional training and misuse. System-level upgrades are usually possible by upgrading one or more sub-assemblies rather than changing the entire equipment. By facilitating easy disassembly and reassembly of the machines, thus improving the accessibility to the part requiring maintenance or replacement. A common implementation of this rule is the use of standard USB connections in electronic devices.

Principle 1: Maintainability Benefits Most from Simple Guidelines

It occurs in the pages of specialized literature and in the speech of educated people. About 96% of English native speakers know the meaning and use the word. Policies and Procedures means the written policies and procedures of the Client in any way related to the Services, including any such policies and procedures contained in the Organic Documents and the Offering Documents. Please help to improve this article by introducing more precise citations. Some investors now expect stocks to maintain the rally through the typically quiet Thanksgiving holiday and into December, when the next major update on the health of the labor market will be released.

definition of maintainability

In that context, the maintainability of the train locomotive has to be decided in such a way that it is sufficient to cater to the failure rates for each sub-system of the locomotive. In some cases, maintainability involves a system of continuous improvement – learning from the past to improve the ability to maintain systems, or improve the reliability of systems based on maintenance experience. Assigning unique part numbers ensures that correct parts are arranged for a maintenance job avoiding unnecessary downtimes.

Reliability, Availability, Maintainability (RAM) Concept Explained

And, of course, planned downtime when an asset is scheduled to be unavailable. Preventive MaintenanceSchedule repeatable tasks for your assets with ease. Some of these military standards have been dropped but they still contain useful background information.

SIG has collected empirical evidence that issue resolution and enhancements are twice as fast in systems with above-average maintainability than in systems with below-average maintainability. A factor of two is a significant quantity in the practice of enterprise systems. The time it takes to resolve issues and make an enhancement is on the order of days or weeks.

definition of maintainability

Remember that you are writing code not just for yourself, but also for less-experienced developers that come after you. This thought helps you to simplify the solution you are programming. Maintainability is not an afterthought, but should be addressed from the very beginning of a development project.

What is Reliability, Availability and Maintainability (RAM)?

Asset condition monitoring is a well-known and proven technique for reducing the P-F interval of the asset. Ideally, you would have information on the asset health recorded in your CMMS system or other software. You could then use that info to determine the actual failure rates of the asset. The actual maintenance level could be adjusted corresponding to those failure rates while taking into account the desired trade-off between reliability, maintainability, and availability. For instance, you can increase maintainability by reducing the number of items to sign off on your preventive maintenance checklists. However, this will likely result in some parts of the machine not being properly inspected, increasing the probability of failure and decreasing its reliability.

Reactive maintenance and repeated corrective maintenance on a perpetually failing asset is no way to do business. Failure modes, high maintainability, and unexpected maintenance costs all reduce time on task, productivity, and efficiency. Understanding your equipments’ uptime is an essential aspect of the concept of maintainability.

Download our Preventative Maintenance Checklist

Availability is the extent to which an IT resource is ready to perform a task when requested. Reliable plants are safer plants as well–when reliability metrics go up, safety incident metrics tend to go down. These example https://globalcloudteam.com/ sentences are selected automatically from various online news sources to reflect current usage of the word ‘maintain.’ Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors.

For example, most electronic home appliances show an error code for commonly occurring issues and/or failure modes. Complicated machinery in heavy industries (process chemical, power, manufacturing, etc.) has elaborate systems of monitoring installed on them. These systems include temperature sensors, pressure sensors, vibration monitoring devices, and other condition-monitoring equipment that is used as a part of CBM and/or predictive maintenance.

Closing the Skills Gap with On-The-Job Training (OJT)

Purchasing assets that are easy to maintain is an important factor to consider during the procurement process. In absence of such a monitoring system, a costly and time-consuming hit-and-trial strategy shall be adopted – decreasing the maintainability of the asset in the process. An important metric to gauge maintainability is the cost spent on maintaining an asset. Maintenance cost as a percentage of replacement asset value is usually monitored to ensure that the costs are within the ranges obtained from the industry benchmark. Lower maintenance cost spent on an asset implies higher maintainability.

The guidelines in this book present metric thresholds as an absolute rule. For instance, in not available, we tell you to never write methods that have more than 15 lines of code. We are fully aware that in practice, almost always there will be exceptions to the guideline.

The maintainability engineer then works with the selected item principal engineer for scheduled maintenance time reduction. As a last resort, maintainability figures may be reallocated and maintainability margins attacked or margin values exchanged in other parts of the architecture. Examples of nine common maintainability tasks are summarized below. Difficult-to-maintain source code is a big problem in software development today, leading to costly delays and defects.

When someone gives you a problem and requirements, you are able to come up with a solution and translate that solution into a language that a computer understands. If you regularly have to change source code written by others , you know that it can be either really easy or really difficult. The change is nicely isolated, and tests confirm that it works as intended. At other times, the only solution is to use a hack that creates more problems than it solves. Training and continuous improvement programs can assist in bringing maintainability times down too.

Maintainability needs to be addressed from the very start of a development project. We understand that it is hard to see whether an individual “violation” of the guidelines in this book influences the overall maintainability of the system. That is why all developers must be disciplined and follow the guidelines to achieve a system that is maintainable overall. Therefore, your individual contribution is of great importance to the whole. Even though ISO does not describe how to measure software quality, that does not mean you cannot measure it. In not available, we present how we measure software quality at the Software Improvement Group in accordance with ISO 25010.