Implementation can be divided into given below parts.
1). Need Analysis
2). Vendor Selection
3). Process Mapping and complete data gathering.
4). Creation/Deployment of HRIS application in Test servor
5). Testing by sample users and all the spoc (If testing is ok)
6). Pre-deployment training to users.
7). Deployment of HRIS in production
8. Post Training and Support.
Above mentioned parts will be there in most of the implementations. Duration and cost will be depend upon nature of project. Ideally most of the project require 3 months duration.
If you give me more information what exactly you are looking for so that i can help you.
6th April 2011 From India, Hyderabad