Requirements analysis specification and requirements specification

        The members of the project team conduct demand research on the system to be developed , It is necessary to write the corresponding requirements specification .

As a software engineer , You need to know the difference between the requirements analysis specification and the requirements specification , In order to write the right requirements document at the right time .

What's the difference between the two ：

（1） Different in object orientation

       demand analysis Instructions are often oriented to Business people 、 user .

       demand specifications Instructions are often oriented to Design 、 Developer . 

（2） The generation phase is different
       Generally, there is a requirement analysis specification first , The requirements analysis specification is prepared by the requirements engineer , Then there is the requirement specification , The requirements specification is provided by the requirements analysis engineer or the business process analysis engineer 、 The software profile designer writes .

       In the software process , The requirements analysis specification is often the input of the requirements specification , Prepare requirements specification according to requirements analysis specification . 

（3） The content focuses on 、 Different granularity

        The requirements analysis specification focuses on the business logic to be solved by the system 、 The functions to be realized are clearly described , More macro . 

        The requirements specification focuses on the constraints of the system 、 Input 、 The output and process are clearly defined , More specifically .

Let's talk about it more generally

        Requirements analysis specification ： Generally speaking, it is for a certain market or customer group , Similar to research report , The key point is to show what functions the product should meet , What's the point 、 hotspot .
        Requirements specifications ： It starts from the business rules , A little more detail tends to the outline design of the software . Is developed from 、 Talk about product functions from the perspective of testing , It should include the prototype interface 、 Business to mouth 、 Activity map, etc