Im a noob when it comes to statistics. So please pardon my lack of knowledge in this post.

I need to do a statistical analysis on a set of questionnaires. There are 3 sets of questionnaires for 3 different populations (Human Resource Reps, Managers, Employees). My hypothesis is "An ERP implementation helped to increase work quality, efficiency, productivity and accountability across HR business processes in an organisation." Dependent Variables being - work quality, efficiency, productivity and accountability. I have a set of questions in each questionnaire which attributes to each of these variables. I'm using a 5 point ordinal scale for measuring response.

What statistical analysis could I use for proving my hypothesis right or otherwise? I came across chi-squared test but there is no link between two variables in my case..or so I think

I also read up about factor analysis and conjoint analysis, but could not seem to fit my data there..or maybe I'm wrong.

Would you please guide me? Thanks a ton!

- Nisha