System, method and program product for tracing first, second and third processes for producing a product. First, second and third process instances for the first, second and third processes, respectively, are generated. Tracing information is stored in association with the first, second and third process instances to indicate respective execution conditions. The third process instance is executed after the second process instance, and the second process instance is executed after the first process instance. The first process instance yields a product which is subject to the second process instance, and the second process instance yields a product which is subject to the third process instance. A first pointer indicates that the second process instance follows the first process instance, and a second pointer indicates that the third process instance follows the second process instance.