Build & Test Prep
Table of Contents
Team Vision for Build & Test Prep PhaseGoals:
- Update Risks and BoM
- Analysis of critical components
- 3D Model of critical components
- Print/Prototype of critical components
- Start Tech Pack for Harness
- BoM updated to include all connection components (ie pins)
- Risks updated to reflect application of safety standard
- Initial 3D models made for most critical components
- Initial Print/Prototype created for critical components
- Tech Pack started
- Started Problem Tracking
- Updated Test Plans to be more explicit
3D Models3D models have been created in Fusion360 for the tablet case, crossbar, track, and slider. These are the major components of the device, and all models are still a work in progress. Future plans include developing 2D drawings from these models once the design is more finalized.
Test Plan SummaryTest plans have not changed much from the Problem Definition version of the document (here) though they have become much more detailed. A spreadsheet has been created for each test, in order to better organize the information. An example can be seen below.
The test plan used in this example is TR25, the final stage in the User Testing, which is primarily concerned with ensuring a Positive User Experience. A section at the top of the sheet identifies who performed the test and when it was performed, and there is a spot to indicate the fulfillment of the associated Quality Requirement(s). Most test plans refer to a specific system (ie Moving System or Harness) and indicates the specific measurement to be made, along with the acceptable values for that measurement. Necessary equipment is identified, and the general scheme for collecting data is described. The meat of the spreadsheet, though, is the flowchart that details the process for performing the test. In certain cases, including TR25, the measurement to be made is actually a quantification into categories. In these instances, the numbering system to be used is also detailed. Here, observations are to be made on a 1-5 scale. At the end of each sheet is a space to put the summarized data obtained, and a conclusion regarding the fulfillment of requirements.
The full document can be found here
Future plans for testing include the creation of forms for the test personnel to fill out during the tests. Work continues for obtaining IRB approval for human subject testing.
Risk and Problem TrackingWe have started tracking our risks a little differently. We've decided that the most important thing is for the User Risks to approach zero, so we adjusted our Risk Assessment Graph to reflect only the user risks. In this manner, we can get a better idea of the risks still inherent in our project and focus on addressing those.
During the latest update to the risk graph, a dramatic decrease in the total value was seen. This is due to the application of a safety standard, ASTM F963: Standard Consumer Safety Specification for Toy Safety. This standard was chosen because it covers a range of tests targeted at making a product safe against abuse by a child. The standard includes tests for impact, along with specifications for entanglement, pinch hazards, protrusions, and similar dangers that could pose a risk to children. Though our product is not intended as a toy, it is understood that our user will most likely abuse it in some way.
Our team has also started tracking problems using the prescribed Problem Tracking spreadsheet.
Design Review MaterialsInclude links to:
- Presentation and/or handouts
- Notes from review
- Action Items
Plans for next phaseNext benchmark: Week 5 Subsystems Demo
- Pulley System
Team Work Plan to reach these goals: