What fundamental action can substantially improve reliability?

Applying the right lubrication strategy is a fundamental action that can significantly enhance the reliability of equipment and systems. Lubrication plays a vital role in reducing friction and wear in mechanical components, which can lead to lower failure rates. Effective lubrication contributes to the smooth operation of machinery, helps dissipate heat, and prevents corrosion, thereby extending the lifespan of components and reducing the likelihood of unscheduled downtime.

Furthermore, a well-planned lubrication strategy not only involves selecting the appropriate types of lubricants but also optimizing the frequency and method of application. This attention to detail ensures that critical components receive adequate protection and performance, directly correlating to improved reliability.

The other options, while important in their own contexts, do not have the same direct impact on maintaining and enhancing the operational integrity of machinery as a well-executed lubrication strategy. For instance, training programs, regular inspections, and investment in new equipment can all contribute to overall reliability, but they may not address the immediate needs of equipment operating under friction and wear without proper lubrication in place.