how do we know if we need to make a table or not in dilr

only one thing that can help you and it has also helped me solving at least 75 LRDI sets then you know the gut felling and your brain goes in automode to solve it

Table generally makes data systematic and easy to recall. If you can put it in yours words that too can work but when there is large data it is prefer to make a table and get it done easily.