devloping phase?

What are the problems we face in development phase? please tell me about it?

There are some following common stages or methodologies include in Software development, collectively it called as the software development lifecycle, or SDLC, like Market research, Gathering requirements for the proposed business solution, Analyzing the problem, Devising a plan or design for the software. And for all this purpose people use devsecops which protect your software from injections and all.