Hi Naveen,
What you hoped is not very correct.
I am a certified instructional designer and I have completed ISTD. I know for sure that TNI and TNA are part of the Analysis phase of ADDIE; however they are sequential and TNI leads to TNA. Here are the differences for everyone’s knowledge:
1. TNI is the first sub-step of the ADDIE; TNA is the second sub-step
2. TNI is a process to identify business, job performance, training or individual needs and the learning gaps in Knowledge, Skills or Attitude pertaining to them; TNA is the process of analyzing the findings of the TNI.
3. TNI is more assessment oriented; TNA is more research oriented.
I am appending a TNA report. I hope this helps….