You can find more information about HACCP requirements in this PDF document: http://meat.tamu.edu/pdf/docket98006N.pdf

HACCP = have a cup of coffee and pray. there plan is to make beef patties e. coli free

They are two very different courses. ServSafe is about food safety and is directed mainly at the food service industry. HACCP certification means that you can design, write and implement a HACCP plan. Of course, understanding food safety helps in understanding HACCP.

HACCP is used to try to prevent food-borne illnesses before they start. For example, a restaurant with a HACCP plan may buy fish. One point of the HACCP plan may be what to do when the fish arrives at the restaurant. The plan, then, could be instructions on how to properly inspect the fish before accepting it into the kitchen.

Not so much impact on quality, but on safety. HACCP is not created to deal with quality of product, but their safety for human consumption.