|MSD I & II||MSD I||MSD II|
Phase 2: Systems Re-Design
Team Vision for Systems-Level Re-Design PhaseThe work breakdown structure outlines the tasks that were to be completed in the systems re-design phase.
- P17431-St. Joseph's Problem Tracker.xlsx
- P17431_Storage Cart BOM.xlsx
- P17431_Cart Tipping Feasibility.pdf
Revisiting Customer Needs
After the platform lift concept was closed, the team looked back at the customer requirements from the end of MSD I to see if there were any changes that needed to be made. At the end of MSD I, customer requirements SA8 and SA9 were added. After these new additions, no further changes were made for the customer requirements. The live document can be found here: updated requirements spreadsheet.
Revisiting Engineering Requirements
The engineering requirements were also reviewed to see if any changes needed to be made since MSD I. As the platform concept was no longer being pursued, engineering requirement number 19: "vertical distance from floor for overhead storage" was removed as the new concept to be pursued could not be attached to the ceiling. Also engineering requirement number 7 was updated with a new name of "Bed Bug Resistance" in order for the testing to be based of a checklist rating. A test plan was also added for this engineering requirement. The live document can be found here: updated requirements spreadsheet.
Updated House of QualityThe house of quality was updated in order to accommodate the changes made to the customer requirements and the engineering requirements.
Functional DecompositionThe functional decomposition remains unchanged and is shown below. The live document (Microsoft Visio in a .zip file) can be found here.
Morphological Chart & BrainstormingAfter revisiting all the fundamental MSD I documents, the team came together and started to brainstorm using the Morphological method. We looked into different methods and locations to store the mattresses with the first floor. However, any concepts that we came up with could not utilize the ceiling. Below are the ideas that the team thought would best fit the current state.
Meeting at St. Joseph'sThe team met with staff members from St. Joseph's to outline the concepts that had been generated and to solicit feedback and brainstorm new ideas with the staff. The minutes from that meeting can be found here.
Pugh's MethodAfter discussing with Sam, the cabinet concept and loft improvement concepts seemed to be the strongest ideas. In order to further evaluate what would be best to do, a Pugh's analysis was completed using the previous selection criteria.
Overall, we can see that the original cabinets came in first place and the fork lift mechanism came in second place. These two concepts were designed in more detail in order to understand the build and functionality of each one.
Basic Designs of Top ConceptsPugh's Method revealed two clear front-runners for the new system design: the "forklift" concept and the "cabinet" concept. Basic designs for each were created to present to members at the St. Joseph's community meeting. A basic design for the storage carts was created so that community members could be updated on our progress in that area. The designs are described below.
Forklift ConceptThe "forklift" concept originated from the team's concern that the space in the loft would go unused in many of the proposed concepts. In the forklift concept, two guide rails are mounted to a wall in the hospitality room, spanning the opening in the wall that previously housed the TV. A lift system travels up and down the guide rails, similar to the forks on a forklift. The mattresses will be stacked on wheeled carts in the hospitality room, then the carts will be wheeled onto the forks of the lift. The forks will then raise the cart to the level of the loft. In the forklift concept, the TV opening will be expanded so that a cart with a stack of seven mattresses will be able to pass through the enlarged opening. A staff member or guest will climb into the loft, and pull the cart off the forks. It will be wheeled to the side to make room for the next two carts. The forks will be lowered to floor level to pick up the next cart. To set the mattresses out at night, the process will be reversed. This animation illustrates the operation of the forklift concept (AVI format).
Cabinet ConceptThe cabinet concept design is shown below.
Storage Cart ConceptThe storage cart design is shown below.
St. Joseph's Community MeetingThe PowerPoint we presented at the community meeting can be found here.
Minutes from the meeting can be found here.