The current economic scenarios have very sophisticated consumers. they have needs that have given way to manufacturing companies must produce to satisfy demand. Since then the product quality must be guaranteed, causing companies to identify with international standards that are required and ensure competitiveness in the markets in which they participate. The general management requires the business under their charge are fully identified and put into practice what the culture of quality, their philosophy is demanding, precisely, is to know about the benevolence, scope effects generated by the analysis of the ways and failure effects (FMEA). The AMEFs were formally introduced in the late 40’s through the military standard 1629. Used by the aerospace / rocket development, the FMEA and the even more detailed analysis of Critical Failure Mode and Effects (ACMEF) were very helpful in avoiding errors on small sample sizes in costly rocket technology. Luis Moreno told us about it, we think that traditionally, in the process of marketing goods and services, and in order to satisfy the customer, companies have been obliged to offer guarantees, ie, to engage with the customer for a specified period to repair or replace totally or partially operational defective products or workmanship. While this compromise is quiet for the consumer, the inability to dispose of the product for a period of repair or replacement, or it breaks down very often, represents a source of dissatisfaction, which translates to a loss of prestige for the supplier. Similarly, in cases where the product or service is used in remote locations or in very critical conditions, the guarantee goes into the background and the main interest lies with the customer that the product does not fail.