Establish Target Specifications
Table of Contents
Step 1. Prepare the List of Metrics
The table below presents the metrics, or engineering specifications, that will be used by the team to design against.
|1||Chamber Temperature||High||Degrees Celsius|
|4||Corrosion Resistance||High||Chemical Resistivity|
|7||Chamber Pressure Accuracy||High||Torr|
|8||Sample Capacity||Low||# of samples|
|9||Temperature Monitoring Accuracy||Mediate||Degrees Celsius|
|11||Cooling System Life Cycle||Low||Subjective|
|12||Compliance With Budget Requirements||High||% of budget used|
|13||Upgradability of System||Mediate||# of add-on/upgrades|
The metrics and engineering specifications in the following matrix are from the previous two lists of these quantities on this website. Related metrics and needs are indicated by an "x" placed in the corresponding cell of the matrix. If all needs are met by the project metrics, there will be no empty rows for any one need. If an entire row is blank, another project metric is needed.
|Needs and Metrics||Engineering Metric 1||Engineering Metric 2||Engineering Metric 3||Engineering Metric 4||Engineering Metric 5||Engineering Metric 6||Engineering Metric 7||Engineering Metric 8||Engineering Metric 9||Engineering Metric 10||Engineering Metric 11||Engineering Metric 12||Engineering Metric 13||Engineering Metric 14|
|Customer Need 1||x|
|Customer Need 2||x|
|Customer Need 3||x|
|Customer Need 4||x|
|Customer Need 5||x||x||x|
|Customer Need 6||x||x|
|Customer Need 7||x|
|Customer Need 8||x|
|Customer Need 9||x||x|
|Customer Need 10||x|
|Customer Need 11||x|
|Customer Need 12||x|
|Customer Need 13||x|
|Customer Need 14||x|
|Customer Need 15||x|
|Customer Need 16||x|
|Customer Need 17||x|
Step 2. Collect Competitive Benchmarking Information
Relatively few Sr. design projects start from a clean sheet of paper. In most cases, there are some baseline solutions or products that could meet the vast majority of the customer's needs.
Write one or two paragraphs about each benchmark solution from the market place. Include a picture of the product, preferably illustrating the product in use or operation.
LABCONCO Benchmarking (freeze drying)LABCONCO makes freeze dry systems. These freeze drying and testing systems are very similar to what is needed for Dr. Varela's aero gels testing. A Teflon coating is used for corrosion resistance among the parts in this system that are wetted. The systems are capable of cooling to below -50 degrees Celsius and maintaining temperature. Vacuum pumps used in these systems are also capable of 27 to 88 Lpm flow rates--this can be transformed into a maximum size chamber for evaluation against current design plans.
Wisconsin Oven BenchmarkingThese researched ovens from Wisconsin oven are almost exactly what are needed for curing the composite materials that Dr. Ghoneim is actively researching. These ovens use forced air convection to bake and cure samples. These systems are made of stainless steel and have application temperatures between 30 and 300 degrees Celsius. Wisconsin oven sells a vacuum oven that has all desired product features except the ability to go down to -20 degrees Celsius currently. A search into customizing this oven or retrofitting a cooling system to it will be done in SD1--most likely this idea will be cost-inhibitive.
- Benchmark 3
- Describe the third benchmark solution here.
Use this table below to compare how pre-existing solutions should compare against the design team's efforts. See the example Table 5-6 on Page 80 of the text by Ulrich and Eppinger.
|Metric No.||Need Nos.||Metric||Importance||Units||Benchmark 1 Value||Benchmark 2 Value||Benchmark 3 Value|
|3||13,14||high||conform/does not conform|
|5||1,7,10,11,18||high||degrees C / Torr|
|7||3,4,16||high||in^2 / #|
|10||1,7,10,12,18||mediate||degrees C / bar|
Step 3. Set Ideal and Marginally Acceptable Target Values
Given the customer needs, awareness of the marketplace, and resource limitations of the current project, assign preliminary engineering specifications on each of the metrics. In addition to setting the nominal or target value or each specification, provide guidance to the team on the ideal value or direction that the team should strive for, once the nominal target values have been realized.