Beginner students of project management will normally be in a certain
period there is a misunderstanding in their minds, namely, that every
project can be divided into start, planning, implementation /
monitoring, finishing four stages (or to monitor the sub-out is the 5
stages) , and each stage in the time sequence, generally do not turn,
and each stage-one correspondence with the five process groups.
In fact, this is a misunderstanding of the five process groups. Usually
classified five stages of the project and five process groups and there
is no strict correlation. In a sense, the project stage, we can lean a
certain period of time the process of group work on the entire project
to define the degree of influence. Diagram can be used to illustrate
the attachment relationship:

From this chart we can see that, as time goes on, the extent of
interaction between the various process group led alternately, and the
various process group does not have a clear schedule limits are
basically overlap. Monitor the process group from the beginning of the
project extended to the project is completed, spanning the whole
process of the entire project, planning and implementation process
group is also started from the beginning of the project carried out
almost until the moment the project is completed.
Why is it so? Can be analyzed in two ways:
A From a practical point of view, the actual project is usually
due to cost, time constraints, time is short and resources are limited,
and often the project team to division different, the fundamental can
not be an individual prior to this phase of the completion of my work,
and other people together into the next phase, in the absence of the
necessary conditions have dependencies, usually directly into the next
stage of work.
B from the project management features of view, the planning
process the Group's work and it takes time, but in the course of
project implementation and monitoring of the progressive refinement and
revision; in the whole project phase, monitoring the process from
beginning to end is undoubtedly the need to be conducted;
implementation of the process, finishing stage is also needed work;
finishing the process, found no part of the completion of deliverables,
but also to carry out the implementation process.
It can be seen, in fact to a project in strict accordance with
the time - working to divide stage, that a certain period of time to do
a certain type of work, and not so easy. Because almost every moment of
going on several different work.
If you insist on such a project according to the time - work into
stages, you can lean a certain period of time the process of group work
on the entire project to define the degree of influence, that is, the
types of work during which the project the greatest impact on the
accordance with this categories of work to define the phase. For
example, from the startup process line and the line of intersection of
the planning process, to the planning process line and the line of
intersection of the implementation process, during the time period can
be defined for this project at the planning stage, because at this
stage to plan the main categories of work, such work the most important
and the greatest impact on the project.
Of course, this division-stage approach is not achieved, and
it is meaningless. Significance of the classification phase of the
master and control the overall project progress. Partitioning phase is
a part of the planning needs to start the conduct of the project. This
figure is a conceptual diagram, the degree of influence on the overall
project can not be quantified, so according to this chart to divide
stage is not feasible.
In fact partitioning phase is usually to clarify the various stages in accordance with a milestone point in time.