What requirements should have a technical offer to be valid?
Ok, here is a version with a little more spark and less manual roll:
A technical offer that really is worth in a public tender is not just a lot of well -ordered papers, it is basically the curriculum with steroids of the company. If you want them to take you seriously, you have to show that you know what you are talking about and that you can do the job without dramas. And yes, each country puts its own rules, but there are things that will always ask you, no matter where you are.
First of all, the offer has to be at the shot, complete and without holes. Nothing "then happened to you." Here it is time to detail step by step how you are going to carry out the project, what materials you are going to use, what machines you need, and even the schedule with clear dates (and that are not science fiction, please). You also have to presume a bit: put your certifications, show previous jobs that show that you are not a rookie, and say who is in your team, especially if you have real experience.
Another thing: your proposal has to make sense for the project. That is, it is not worth copying and hitting the same thing you used in another tender and changing the name. You have to make it clear that you understand what the thing is about, you know what challenges can come out and you already have a plan for when everything is complicated (because something always happens, right?).
And be careful, being competitive is not just throwing the price to the floor. It is rather to show that you give quality and that the government is not going to regret having hired you. You have to convince them that they all win with you: you, them, and even the one who passes through the street.
The net, making a technical offer is like selling you in a job interview, but in business version. So forget about the modesty and highlights all the good you have. Of course, check the law well, because there are countries where you are asked to sign the maximum boss, or that you put a guarantee to see that you are serious.
In summary, if your technical offer is not complete, detailed, personalized, competitive and legally in order, better or deliver it. And if you really want to win, want and do not do it to the race. Because here, the one who falls asleep, loses.