What are the main aspects that we need to consider while integrating a project plan?

Project Plan Development, Project Plan Execution and Integrated Change Control

time-cost-man power-equipments-materials

Program description Focus and rationale for evaluation Evaluation design Data collection and analyses Products of evaluation and their use Project management—who participates? Budget estimate Feasibility Arrangement of resources &steps to over come resource constraints if any !

Thank you Tamer for your good valuable question.
The main aspects which should be considered to develop the project integration management plan are as following :
1- Develop the project charter as a first step.
2- Develop the master project management plan which is a collection of time,cost,quality.
communication,human resource.risk.procurement and scope management plans
3- Direct and manage project execution.
4- Monitor and control project work.
5- Close the project or the phase of the project .
Thank you Best regards

To Implement Project Plan various donor agencies have their own project cycle, I would say CIDA, GIZ, World Bank.
Here I am explaining the World Bank Project Cycle.
For Project Implementation, it goes through various stages including 1.Country Assistance Strategy 2.
Project Identification 3.
Preparation 4.
Appraisal 5.
Negotiations and Board Approval 6.
Implementation and Supervision 7.
Implementation and Completion 8.
Evaluation.
  Thanks   Regards   Abid Irfan  

Plan is one of the themes of the PRINCE2 project management methodology and while developing it, we should keep the product to be developed in mind.
The various steps involved in the product based planning should be to:1.
DESIGN THE PLAN2.
DEFINE AND ANALYSE THE PRODUCT3.
IDENTIFY ACTIVITIES AND DEPENDENCIES4.
PREPARE THE ESTIMATE5.
PREPARE THE SCHEDULE6.
DOCUMENT THE PLAN7.
ANALYSE MAJOR RISKS.

we have to get the best ( material , supplier , manpower , realistic time table which matching project target ) , working hard as team work to get best results taking all consideration

Plan success is depends on many aspects such as for the success of the project depends on co-ordination between team, capital investment, cost effectiveness, effective utilization of resouces, time effectiveness towards objective.

Just check the following: 1.
Does this project plan fully covers the project goals and objectives? 2.
A Project Organisation been set up and is approved? 3.
Have the Cost, Schedule and Resources been worked out and are in harmony with the set goals? 4.
Have threats, Risks and issues been identified and a risk management plan exists? 5.
Have project deliverables and a communication plan been set up? Then go ahead and integrate the Project Plan and seek the mandate from the project owner. 

constraints of the project area, the qualification of the labor work, working conditions (climate, resources, ...

1. Milestones

You will hear a lot (and talk a lot as well) about these as the project progresses. They are simply the dates that you slot in for meeting certain checkpoints along the way to a successful conclusion. In a fairly simple project these will be easy to slot in but in a more complex piece of work there are likely to inter-dependencies which make it extremely difficult to put exact dates on these. If you can get these right at the outset then life will be a lot easier for you further along the way. Writing these down is also an excellent way of breaking down the project into manageable chunks. If you have been given the task of building a new system then this might seem like a daunting piece of work but once you see the individual tasks involved in it then it shouldn’t really look so bad after all.

2. Resources

It is all very well knowing what needs to be done but who is going to do it? Sorting out the project resources on the plan will let you see whether the timescales are do-able or not. After all, the milestone dates on their own don’t mean all that much until you work out whether they are feasible. This is also the time when you will find out whether you need to ask for extra resources. As with everything else in the project plan, you will be a lot more comfortable if you build in some contingency here to give you a bit of breathing space.

3. Aim of the Project

This is often simply a link to the original business case, although you might choose to re-word it to make it easier for the target audience to get a grip on it easily. The aim of the project should be relatively straightforward to put down in words, and if it isn’t then you probably need to do some more investigation on the subject. I actually find that writing and re-writing the aim is a good way of making sure that I know exactly what I am being asked to deliver. If you find that you need to pad it out with vague and fluffy words then this is probably due to you not having a firm enough grasp on it, and this is something which needs to be sorted out as quickly as possible, as it will almost certainly lead to problems later on.

4. Tolerances

When you tackle your first project then you (like me) may rather naively expect everything to go to plan. This is extremely unlikely to be the case and you should consider what kind of tolerance can be built into the plan right at the beginning. For example, you might be able to work with a5% tolerance on the timescales you are working to, or a set figure on the budget levels.

5. The Schedule

This is the document on a Gantt chart which plots all of those facts and figures you have worked out. The big issue with any project is that it is only likely to stay correct for a relatively short period of time. As the project progresses things will change and your dates and information will quickly become outdated. This isn’t something to be afraid of but it is simply a fact of life for any project manager. What this means is that you need to be aware of the information in the plan and how to change it when you need to. This is because you may need to react quickly and make some big changes in order to get the project back on track at some point. This is completely normal for all project managers so you should brace yourself for having to do this and get as much preparatory work done as you possibly can.