Discuss the function that the HRIS serves, and identify how that system will solve the business issue. Compare and contrast at least three HRIS vendors. Based on this comparison, make a case for the one vendor that you recommend for your client. Determine how you will implement the HRIS using one of the change models discussed in the textbook. Create a project management roadmap for the client with projected timelines. Discuss the costs associated with the implementation, justifying your claims with a cost benefit analysis.