PLAN & SCHEDULE

Plan ( is everything)

1. A set of activities to achieve a targeted that may be a new construction, revamping, demolition, maintenance, production chain or a promotion scheme.
2. Determine budget, resources and time.
3. Developing logic.
4. Use of budget, resources and time.
5. Scheduling is an integral part of planning.
6. plus many other things necessary to develop and implement it.

Schedule (a model of everything)

1. The modeling of all the above, is how you communicate your plan, is the language of your plan, is part of your thinking process.

If you cannot plan it you are not scheduling, perhaps just working as a keyboard jockey. Learn to plan with same intensity you learn your scheduling tool.

If you use a wrong or limited model then your thinking might be wrong or limited, make sure you use adequate tools.

Good topic.

As per my understanding, Planning is all about identifying the best logic for integration of things listed under the heading called schedule.

For Instance

Schedule

a. Resources

b. Money

c. Time

d. List of disciplines involved and so on....

Plan

To link all those listed above in a smart logical way. The process is infinite as the integration depends on ones' expertise, real-time experience, understanding level of project etc.

What ever you want to do

AND  

how you want to do to accomplish a project is PLANNING.

when u give a time sense to it(ACTIVITY, RESOURCE, MONEY ETC), it becomes a schedule. when you ask yourself -when you are going to do it-you schedule it.

WHEN THE TIME TAKEN IS ZERO PLAN = SCHEDULE.

enjoy.

I agree with the comments, planning is a precursor to scheduling (or it should be);for more on planning see: http://www.mosaicprojects.com.au/WhitePapers/WP1039_Project_Planning.pdf and http://mosaicprojects.wordpress.com/2010/08/09/project-planning-and-scheduling/

This distinction is clearly made in a new book, Guide to Good Practice in the Management of Time in Complex Projects, for more on The Guide see: http://mosaicprojects.wordpress.com/2010/11/26/the-guide/