Jenkins incremental build

I am using Jenkins 1.462 and the version is maven 3.0.4. In Jenkins, I checked the "Incremental build - just built modified modules" checkbox

I want to find out 2 questions:

• Is incremental build enough? Here How can I create a Jenkins assembly from a single module in a multi-module Maven assembly from Subversion? for example, it is indicated that it does not work 100%. Here http://www.slideshare.net/andrewbayer/7-habits-of-highly-effective-jenkins-users on page 19 indicates that incremental assemblies complement complete assemblies , not replacements.

• Regardless of whether the incremental assembly is performed with the incremental assembly, does it only work? What I mean? If I have modules A, B, X, C, D. X uses A and B, C uses X, D uses C, and I make changes to the X module. Then I want to recompile modules X (itslef), C (which use X directly) and D (that is, in a transitive closure, D uses C, which uses C).

Note: this is the only change I made to enable incremental builds.