Why is add-on better than custom, any day?
Implementation is like marriage. For better or worse, you choose a piece of software, take it under your roof and commit to it for a long term, so help you God.
And as in marriage, if you want to live happily ever after with your new software, the my way or the highway attitude doesn’t help much—you must be open to compromise.
Last Monday, I argued for avoiding customizations if at all possible, an argument I stand by firmly. It’s like forcing your wife to color her hair pink. I don’t know about your wife, but mine doesn’t color her hair pink. If you like it pink, it’s probably something to think about before turning your yes in.
But NAV is NAV, isn’t it? It has what it has, and if I need it different, I have to customize it, right?
Wrong. You can compromise.

To customize or not to customize, that is the question. When you see a complex business process far from the standard ERP system, a knee-jerk reaction is to reach for customization tools and do the development.
Has your computer ever crashed while you were doing something important, causing you to lose all your work? A natural first reaction to this situation is frustration: your work is gone, your effort went in vain, you’ll never do it as well as you did it the first time…