Individuals and businesses desire a certain quality from a GI service for which they are willing to pay a certain amount of money. If that GI service fails to meet the expectations in terms of quality and price, the service requestor is likely to patronize another provider. The availability of gradually differentiated quality versions of a GI service offered by a provider as a GI service product line enforces the user to self-select the price-quality combination that satisfies her or his needs. By self- selection each user also approves the chosen GI service version as fit for use, and simultaneously.
