100 days is a little over 14 weeks. If you start mid-January, you will have an implementable CX improvement strategy by the end of April.
To show results and build momentum for action that will take you into the rest of the year we have given you a week by week guide for the activity you should be focussing. We have suggested the time required each week for the activities. This is focussed time, and you may want to schedule this into your calendar to make sure that you hit your 100 day target.