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I am wanting to break out costs so we can more easily determine how much it would cost to fix the potential risks. Its more easily digested by upper management when our preventive and corrective actions are in terms of dollars.
Let's stop and take a moment to make a simple assumption. Let's assume that the company will not make a product they can't reasonably expect to make a profit on. Hopefully the engineers and the businessmen are reasonable enough to recognize that if the risks are too expensive to properly control, then they might have a bad design.
Now let's think about the example given earlier where we are talking about the effect of the failure on the customer. If a battery fails vs. a transmission then the car won't run either way! Yep. That's true, and either way the customer has lost primary function of the car. Severity 8. By this standard we can't lower the severity of the battery failure because it still has the same effect, and we don't want to raise severity of the xmsn failure because it may not be hazardous. Unless of course we are talking about changing the scale. We could add numbers 8.1, 8.2, 8.3... but what is the point, and where do you draw the line. Where does the engine failure fit in, or an axle or a tire? You get my point... An 8 is an 8.