Electronic Product Design and development capability can be refined and enhanced only by practical experience. A student can learn these aspects by working in a Engineering Service Company. Building Custom design Solutions for clients will build skills of component selection, black box specs, customer communication and prototype testing\ among many others. **A. Product Design Sections :** 1. Electronic Engineering - Circuit Design, PCB Design, EDA. 2. Mechanical Engineering - CAD, Tool and Die Design, Enclosure 3. Software Engineering Firmware - PC ware, CASE, emulators **B. Methods of Product Design :** 1. Design Automation. - Design and Simulation with Computer. 1. Computer Aided Design - Design on Computer, Breadboard test. 2. Conventional Design. - Paper design with Breadboard test [Circuit Design Service of delabs](https://www.delabs-circuits.com/main/service.html)  - Product and Circuit design. Consulting tech service. **C. Criteria of Product Design :** 1. Ergonomics - User friendly Interface of controls, display, etc.. 2. EMI / RFI Ext.- Immunity to external electrical disturbance. 3. EMI / RFI Int. - Reduction of Internal electrical noise generation. 4. Input Cost - Selecting Cost effective components and methods. 5. Product Safety - Eliminating shock hazard, fire hazard or stress. 6. Corrosion res.- Resistance to Chemical Fumes, brine, gases etc.. 7. Reliability - Long Life reliability engineering, MTBF, stability. 8. Serviceability - Accessibility - Maintenance and repairs, Self test. 9. Vibration - Enclosure / Components to be vibration resistant . 10. Ease of Manufacture.- Manufacture ease and provision for test and Calibration.. 11. PC Interface - RS232, GPIB, etc. for PC Control and recording. 12. Upgrade Ease - Options, Software change, Hardware upgrades. 13. Quality - Design, Components, Production methods. 14. Accuracy - Specifications of performance and its stability. 15. Misuse-Abuse - Rugged design both electrically and mechanically. **D. Criteria of Circuit Design :** 1. Technologies - Time proven technology and Standard Parts. 2. Reliability - Component Selection and Design Methods. 3. Modular - Allow for incremental upgrades and Service. 4. Safety Margins - Overrating for Voltage, threshold, speed, etc.. 5. Testability  - Test Points, Isolating Jumpers, self test mode. 6. Isolation - High voltage isolation, User safety, grounding. 7. Thermal Limits - Dissipation Limit, Heatsinks, Shutdown, Size. 8. Protections - Fuses, Current Limit, Zeners, Varistors, Alarm. 9. Power economy - CMOS Designs, LCD Designs, SMPS, Portable. 10. Electrical Parts - Connector selection, Relays, Switches, PCB. 11. Precision - Accuracy, Resolution, Drift, Thermal stability.