大部分码工都这样。其实， 上面那段code也能体会这个流程

1.Customer Voice (Need, etc). Marketing Needs， Business Needs
>>In that case, it is a need to convert Excel data to TXF file for Tax Schedule D filing.
2.Business Roadmap
>>Will this product be a fit in the company's roadmap? Yes,  the off the shelf software can't meet the needs. A home grown software is preferred
3.Technology Availability
>>Does the company have the technology available for the solution? Excel, Perl, not a big deal in this case
4. A Solution within the schedule (hit the market at the right time) and within the budget
>>Yes, simple solutions using Macro and scripting.
5. Marketing Req ---> Technical Req -->System Design --> Box Level Req/Design
6. -->Coding
7. -->Testing（Dev，Unit， Box， Integration， System， Beta， 。。。） 
8 -->Release
(With Quality Control in all phases)
Coding 相对来说费时最长， 人力最多，但其实压力比较小的一个环节