A plan is a document that takes into account planning within your own organisation's context. Your organisation may be able to do a little or a lot. The main thing is to start and continue looking at how effective you have been and if there is more you can do. 

A plan provides a focus and means of keeping everyone on track towards achieving their language goals. It can be as simple or as comprehensive as you want. There is no one size fits all as can be seen from the various plans that have already been developed in the public and private sectors. 

Learn more about language planning here.