In Schedule 8 you only need to mention 3 duties. You are perfectly fine as long as reference letter duties match with respective NOC code..
When CIC processing your application they will check below things:
1. your reference letter, NOC code, and pay (In your case your pay is good as per NOC code.)
2. T4 and NOA. does t4 and NOA reflect the same amount or not?
Once its done they will request for MR (as per my understanding)
according to me you are good. you will receive MR shortly.
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for 2171, your reference letter should reflect one of below duties( not exactly necessary, around that)
Main duties ( As per http://www5.hrsdc.gc.ca/noc/english/noc/2011/QuickSearch.aspx?val65=2171)
The following is a summary of the main duties for some occupations in this unit group:
- Information systems business analysts and consultants confer with clients to identify and document requirements, conduct business and technical studies, design, develop, integrate and implement information systems business solutions, and provide advice on information systems strategy, policy, management, security and service delivery.
- Systems security analysts confer with clients to identify and document requirements, assess physical and technical security risks to data, software and hardware, and develop policies, procedures and contingency plans to minimize the effects of security breaches.
- Information systems quality assurance analysts develop and implement policies and procedures throughout the software development life cycle to maximize the efficiency, effectiveness and overall quality of software products and information systems.
- Systems auditors conduct independent third-party reviews to assess quality assurance practices, software products and information systems.
Employment requirements
A bachelor's degree in computer science, computer systems engineering, software engineering, business administration or a related discipline
or
Completion of a college program in computer science is usually required.
Experience as a computer programmer is usually required.
Certification or training provided by software vendors may be required by some employers.