Final answer:
c. Earned value.
Among the given options, Earned value' is not a cost estimating technique; it's a project management technique that measures performance, unlike the learning curve and standard costs which are used for cost estimation.
Step-by-step explanation:
The cost estimating technique that is NOT a cost estimating technique among the options given is c. Earned value. The earned value is a project management technique that combines measures of scope, schedule, and cost in a project. It's a form of performance measurement and is not primarily a cost estimating technique. Option (a), the learning curve, relates to the rate at which a person learns a new skill and how productivity improves as a person gains experience, which can be used for cost estimation. Option (b), standard costs, are preset costs for delivering a product or service under normal conditions and are used in cost estimation. Therefore, the correct answer is option (c).