The Excel Diet is based on having an accurate scale. I believe that weighing yourself each day and seeing your trend is the most important way to lose weight.
If you don't weigh yourself it's like:
Driving without a speedometer, how do you know if you're speeding?
Driving without a gas gauge
Taking a test without getting graded
Not knowing how much money you have before buying a big purchase
Having diabetes and not testing your blood sugar
You don't need these things but they make life easier.
I meet many people who don't want to know what they weigh. Some weigh themselves monthly, weekly or not at all. The scale is a tool that with the Excel Diet spreadsheet and some willpower can help you lose weight.
Here's my excel diet chart. I've lost the weight and will keep it off because I weigh myself each day.
The reason the scale and the Excel Diet spreadsheet works is because, you're told how much you need to weigh each day to be on track for your weigh loss goal. If you're behind, then you can make adjustments to what you eat and how much you exercise. If you're ahead you can reduce your exercise and eat some of the foods you crave.