Which source is NOT reliable for information regarding potential maintenance costs of a physical asset?

Testimonials in marketing materials do not provide a reliable source for potential maintenance costs of a physical asset. While they may convey positive experiences and satisfaction, these testimonials are typically aimed at promoting a product rather than providing unbiased, factual information about costs. Marketing materials often highlight benefits or features without addressing the realistic ongoing costs associated with maintenance and operations, which can lead to an inaccurate understanding of what ownership and upkeep might entail.

In contrast, insights gained from other facility managers can provide real-world, practical examples of maintenance costs based on actual experience. Industry associations often compile research and data from various sources to provide benchmarks and standards in maintenance costs, making them a credible source. Manufacturer specifications can also be quite reliable as they typically include detailed information about maintenance requirements and potential costs associated with the asset.