What are the criteria for the effectiveness and success of an IT project, except for the timing, budget and quality?

Question

Project management

It is necessary to determine the criteria for the effectiveness of an IT project in order to identify factors that affect its effectiveness.

Answer 1

Reuse of existing technologies (if we are talking about a company that does not write the first project), ease of support and modification in the future, ease of deployment, fault tolerance + data availability, easy, fast deployment (both from an empty database and from backups), security.
Well, the standard is the customer's assessment of whether the project fulfills the task assigned to it, whether it pays for itself (or whether it saved the required amount of money).

Answer 2

Correct me if I'm wrong, but the customer must (albeit with the help of a PMA or an analyst) announce the project's performance metrics at the design stage. Otherwise, how do you determine whether the project is developing in the right direction?

Answer 3

This is too broad a question to be answered so simply. If this is something commercial, then everything will start with SEO optimization, which many outsourcing companies are simply unable to do at the proper level.
Efficiency for whose side? As I understand it, for the customer's side?!
For example, our customer really wanted his application to get into the top of the app store. And so that after collecting the analytics for N months, it would not have crashes in more than 2% of cases.
As already mentioned above, the metrics must be from the customer.