How can you re-engineer an entire process?

1) Look at the existing process and delete every step that is not needed anymore 2) Establish what requirements the new process has (Regulations- Process flow, Stakeholders- involved and so on) 3) Consider additional opportunities (save time cost or quality, employee and customer experiences) 4) Design new process 5) Test – go live and review periodically - adjust

1.
Establish goals and objectives of the process(es) 2.
Documentation / Study of existing processes, if any 3.
Gap Analysis 4.
Identification of bottlnecks 5.
Development of re-engineered process model 6.
Implementation of the new model 7.
monitoring & continuous improvement until desired results are achieved

Re-engineering is rethinking and major redesign of the existing process in order to achieve performance improvement in term of cost, quality, service etc...
The re-engineering process can be done in 5 majors activities: 1.
Prepare for re-engineering 2.
Map and analyze " As Is Process" 3.
Design " To Be Process" 4.
Implement Re-engineering Process 5.
Continually Improve

first thing, you have to map your as-is process, perform a value stream mapping, see the unneccessary activites, and delete them, try to streamline your process (however, don't overdo it), design your to-be process, and don't forget to document a change document that does not only say what to change, but also answering why, how, even when to do it (if you have the resources).
assign change owner, and implement

set the objectives of the process break the existing process to its smallest constituents collect the required data analyse the process and objectives rebuild it after eliminating the pain areas retest it with small sample users re-evaluate it using the same data collection methodology follow continuous improvement till the objectives achieved

- Perform an As-Is assessment - Gap Analysis - Compare against best practices - Design To-Be state - Identify project to move company from A to B You can utilize various tools such as value chain analysis.

In my opinion, while re-engineering a process, it is very important to have the customer & supplier perspective in mind first.
Who is the customer of the process? What are their expectations about the output? Who is the supplier? How do we ensure quality of their inputs to the process? Once we have answers to these questions, we should go ahead with the mapping, analysis and improvement.
Throughout keeping deployment capabilities in mind.
Else it will remain just another process on paper.

Is there any guideline organization should follow or any thing lead to CMMI levels as per re-engineering.