Very interesting topic Lamiaa. I believe it would be more challenging to work in matrix organization for a project manager.In matrix organization,the product manager would find himself working across functional lines to try to coordinate production schedules, inventories, cash flow, and distribution patterns. Because he has approved all future plans in advance when one or two plans are not working out or falling behind,it creates stressful situation for him.

Such kind of condition often leads to complete or partial failure of project.
-Hetal