I would like to know how to document the steps of the implementation of the EMS and ISO 14001 requirements in a Gantt chart. I know the time frame depends directly of the context of the organization but could you give an example for a 6 months frame (assuming the company has already some things in place).
It is really hard to provide you with precise estimation, since the duration of the implementation process will differ depending on various factors, i.e. size of the company, complexity of the processes, products and services, type of operational control you choose to apply, etc.
Most of the time, you will spend on identification and evaluation of environmental aspects and implementation of operational controls, approximately 40% of the time, the rest of the time you will spend on creating documents, implementing other requirements and performing internal audit and management review.