What is the tool (software) you often use?
It is Excel and Excel VBA.
If there is a standard software that many member can use in the company, I also use the software.
Sometimes I use R and Python if Excel is not enough.
For daily business use, Excel is very useful and powerful tool.
Reasons are below.
"Many people can do that I teach"
"General graphs and statistics can be used easily"
"In 1 file, we can put data set, analysis process and output report"