FD 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||Measure Ranges of Parameters||High||List|
|3||Faults Induced||Moderate||Binary (Pure Number)|
|5||Guidelines Presented (Relative to Faults Induced)||High||Percentage (of Faults Induced)|
|6||Generate Data Plots||Moderate||List (Binary)|
|7||Power Supplied to System||High||Volts|
The metrics, or engineering specifications, that you created in the preceding list should be directly related to the customer needs. In other words, if you have created an engineering specification, it should have some relationship to a need imposed by the customer or the marketplace. Use the table below to map your customer needs against the metrics (or engineering specifications). In many design and product development circles, the rows along the left is often referred to as the voice of the customer, while the columns across the top are often referred to as the voice of the engineer.
|Needs and Metrics||Measure Ranges of Parameters||System Compatibility||Faults Induced||Remote Access/Control||Guidelines Presented||Data Plots||Power Supplied||Database Use|
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.
- Benchmark 1: Bently-Nevada System 1 - Optimization and Diagnostics Software
- Benchmark 2: Prognost Condition Monitoring
On-line condition monitoring of reciprocating compressors and pumps. Allows for improved safety, machine availability, and efficiency. Improves decision making in terms of repair and replacements by providing knowledge on the operation characteristics of the machine. Has the ability to monitor, analyze, and interpret high frequency data to help determine machine reliability. Helps maintain critical economic efficiency of reciprocating compressors.
- Benchmark 3: Windrock Incorporated
Provides on-line performance monitoring for reciprocating engines, compressors, and centrifugal products. Measure mechanical condition and unit performance as well as parameters of horsepower, flow balance, temperature, ultrasonic, and vibration. Incorporates the use of software, hardware (sensors), and systems. Allows the user to monitor, trend, alarm, and diagnose compressor condition and performance.
Competitive Benchmarking ComparisonUse 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||Bently-Nevada System 1||Prognost Condition Monitoring||Windrock Inc.|
|1||Need 1,2,6||Measure Ranges of Parameters||High||Vary|
|2||Need 2,3||System Compatibility||Moderate||List (Binary)|
|3||Need 5,6||Faults Induced||Moderate||Binary|
|4||Need 3,4||Remote Access/Control||High||Binary (List)|
|5||Need 4,5||Guidelines Presented||High||Percentage|
|6||Need 1,4,5,6||Data Plots||Moderate||List (Binary)|
|7||Need 3,4||Power Supplied||High||Volts|
|8||Need 1,4,5,6||Database Use||High||List (Binary)|
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.
|Metric No.||Need Nos.||Metric||Importance||Units||Marginal value||Ideal Value|
|1||Need 1,2,6||Measure Ranges of Parameters||High||Vary||Specific to Donation Compressor (Outlet Only)||Wide Ranges(Outside Donation Compressor Use) at Inlet/Outlet|
|2||Need 2,3||System Compatibility||Moderate||List (Binary)||Yes (Works with compressor and some DR Products)||Yes (Operating Systems, DI-Tronics IV (PLC) Control System, Collection, etc.)|
|3||Need 5,6||Faults Induced||Moderate||Binary||Yes (some)||Yes (critical faults)|
|4||Need 3,4||Remote Access/Control||High||Binary (List)||Could be||Yes (no presence required)|
|5||Need 4,5||Guidelines Presented||High||Percentage||75%||100%|
|6||Need 1,4,5,6||Data Plots||Moderate||List (Binary)||Show data collected (Independently)||Provide Comparison (Failure vs. Normal)|
|7||Need 3,4||Power Supplied||High||Volts||Whatever it takes||110 Volts (Or Standard Voltage)|
|8||Need 1,4,5,6||Database Use||High||List (Binary)||Limited Archives with Clear Display||Offers documentation archives of past normal/failure operation with clear accessibility|
|Metric No.||Metric||Importance||Units||Marginal Value||Ideal Value|
|1||Temperature (Inlet)||High||degrees F||Ambient (Donation Compressor Specific)||-40 to 180|
|2||Temperature (Outlet)||High||degrees F||200 (Donation Compressor Specific)||200 to 350|
|3||Pressure (Inlet)||High||psi||Ambient (Donation Compressor Specific)||Ambient to 100|
|4||Pressure (Outlet)||High||psi||150 (Donation Compressor Specific)||20 to 4500 (Main Product line at 1500|
|5||Flow Rate (Inlet/Outlet)||High||CFM||25 (Donation Compressor Specific)||10 to 8000|
|4||Vibration||Moderate||Hz||Low (Donation Compressor Specific ~300 RPM)||Low (<400 RPM) & High (>400 RPM)|
|5||Acoustics||Low||dB||Donation Compressor Specific||Wide Range of Products|
|6||Power||Low||HP||~25 (Donation Compressor Specific)||10,000 HP (max 45,000 HP)|
Step 4. Reflect on the Results and the Process
Had a difficult time coming up with specifications due to vagueness of the results/impact of each metric or need on the end project result. Also, implementation in Dresser-Rand products could be difficult due to the large ranges of values for each parameter due to a large product line.
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