Project organization

I am working on a case study below and having a hard time describing what each key holder's individual's responsibilities are.

= Key holders =

Project Manager : Alberto Gonzales (Has oversight of the entire project)
Project Champion : Marcia Rodriguez (to act as buffer for all stake holders)
Project Sponsor : Kurt Kevin (To act as a AMC liaison)
Team Member : Ben Benson (leads the electrical team)
Team Member : Joseph Marcos (Has oversight of structural engineering)
Team Member : Alonzo Justus (Has oversight of AMC team collaborating with the project team)

= Background Information =

Acme Home Improvements, Inc. was founded in 1982 in Raleigh, North Carolina, USA. By 2007 the company had 125 stores along the US East Coast from Florida to Maine. Its annual sales are currently $5,400,000,000 with $280,000,000 net income. The average store is about 100,000 square feet with an additional 10,000 square feet of outside garden center. The stores typically carry 40,000 different products from 5,000 vendors worldwide. Major US competitors include Ace, Home Depot, Lowe's and TruValue.

Acme has determined to follow Home Depot and other competitors to Canada and Mexico. In the latter, it has established, in accordance with Mexican law, a joint venture with local interests, known as Acme Home Improvements de México, SA de CV ("Acme de México" or "Acme Mexico City"). (SA de CV = Sociedad Anónima de Capital Variable, a Mexican corporate form.)

There are five major product groups within each Acme store: plumbing and electrical supplies, building materials, hardware and tools, seasonal and garden/yard items, and paint, flooring and wall coverings.

Each store has a store manager, assistant store manager, bookkeeper, an information systems manager and an assistant, a manager for each of the five major product groups, customer service employees on the store floor to assist customers with their purchases, cashiers, receiving/stocking employees, and maintenance/janitorial employees.

Acme de México has purchased a site on which it intends to build and open a new store in Mexico City [Acme Mexico City (AMC)]. The store will have the average 100,000 square feet of indoor space and 10,000 square feet of exterior space for garden products. In addition, a two-story parking garage will be built directly adjacent to the store. It is desired that the project should take no longer than 12 months. The store construction and opening processes include at least eight major activities:

1. Obtain required licenses and permits.
2. Prepare the site and lay the foundation.
3. Build the walls, floor and roof of the structure.
4. Install electrical and plumbing fixtures.
5. Finish interior and stock inventory.
6. Build the garage.
7. Complete all paving and landscaping.
8. Hire and train employees.