Abstract: An apparatus, method, and program product are disclosed for collaborative project modification. One apparatus includes an enabling module that enables a first group of users to modify a first portion of a project in a collaborative environment. The apparatus includes a blocking module that blocks a second portion of the project from being modified by the first group of users. The apparatus includes an updating module that, for the first group of users, conducts immediate updates to the first portion of the project after a user of the first group of users modifies the first portion of the project and conducts deferred updates to the second portion of the project after a user of a second group of users modifies the second portion of the project.

Abstract: An apparatus includes an editing module that composes a first hierarchical dependency tree for a first local object model stored on a first client, the first local object model corresponding to a shared object model of an engineering object, and further composes a second hierarchical dependency tree for a second local object model stored on a second client, the second local object model corresponding to the shared object model. The apparatus includes a dependency tree module that compares the first hierarchical dependency tree to the second hierarchical dependency tree. Moreover, the apparatus includes a merging module that automatically merging a first change to the first local object model and a second change to the second local object model in the shared object model below a common antecedent node.

Abstract: An apparatus, method, and program product are disclosed for collaborative project modification. One apparatus includes an enabling module that enables a first group of users to modify a first portion of a project in a collaborative environment. The apparatus includes a blocking module that blocks a second portion of the project from being modified by the first group of users. The apparatus includes an updating module that, for the first group of users, conducts immediate updates to the first portion of the project after a user of the first group of users modifies the first portion of the project and conducts deferred updates to the second portion of the project after a user of a second group of users modifies the second portion of the project.