How do I accept custom software from a contractor?

Question

Project management

Suppose I formulated business functional requirements for some large system, requested a commercial offer from software companies, and chose a contractor. All programmers are now working on Scrum Agile. What methodologies or frameworks are there for monitoring compliance with the requirements by the contractor and for accepting the completed product? How does it work for you? We need to systematize the experience somehow)

Answer 1

A document "Programs and test methods" is created. In which steps are described step by step to test the required functionality. We do something, we get something. Only in this way and on all points of the TK.

Answer 2

Based on the requirements, a description of the functionality with cases and results is written.
On the description of the functional - the program and test methodology.
Walk through and check.
In this case, it is written not for the developer, who checks "whether it works", but for the customer, who checks whether it works as it should.
The main risk is that pimi is often written according to how the product is already made, which accordingly entails risks.

Answer 3

Why are you so sure?
In your case, it is more productive to use the "Waterfall" model and save on scrums :)
Agile is generally good when the customer does not know what he wants.
So 1 TK document
based on it, write the Application Acceptance Certificate.
Each item from the TK is described there, with the expected result
. After that, an act of shortcomings is drawn up for elimination.

Answer 4

It can be, for example, a checklist with a bunch of essentially applied tests. Well, a classifier of "ticks" such as fatal, critical, optional. Well, the corresponding criteria for passing the checklist