Hello... Turn the question inside out: What will the organization be doing in the future (near, mid, and long term)? What do these strategies or plans (new types of business, new services, skills, growth, contraction, outsourcing, acquisition, etc.) mean in terms of HR planning? From this, there should be a near, mid, and long-term HR plan that interlocks with the business plan. The HR plan becomes the guide for timing, skills, budget, etc., of people resourcing activities.
An example - I led a very large business transformation project. The team knew that they needed some specialized skills four months out. HR was in the loop and laid the plans for recruitment. Two months out, the resourcing kicked in, and the person came in the door on time. (Never mind that I had to resource in Australia for a contract here in Canada - I said the skills were rare!)
Hope this helps. Feel free to delve or probe for more.
"What is the impact of effective HR planning upon people resourcing activities? Can anyone give me an insight? What are the key concepts of HR planning and people resourcing that I must include? Thank you."