Count cell changes in excel based on another cells value

[rywags11]

Hello

I have a workbook which contains a production schedule in a tab titled "Schedule". This tab is constantly updated and I need to count (on going) the number of times the content of Column B, C, and D changes based on the value in column A.

Column A is for the "work order" and the value in this column will always be a unique value. When the work order has been processed, the line containing that work order & all its associated criteria (in columns B, C, and D) are deleted.

I need to put something in the tab titled "Log" that automatically populates new work orders that are entered in the "Schedule" tab and then counts the number of times the value associated with that work order in column B (start date), column C (start time), and column D (SKU) change.

I need help writing the formula to count changes in B, C, and D, but I honestly have no idea how to automatically populate new work orders in the Log & tie the changes in columns B, C, and D to that work order.

Any help anyone can give will be greatfully appreciated!