TG-1101 Engineering Design I Introduction to “Total Design” and “Systems Engineering Design Process” (Week 2)

Overview Total Design vs. Partial Design What is a System ? Systems Engineering Product and System Development Process TG-1101 Engineering Design – Professor Dr De Silva Liyanage (Liya) – liyanage.silva@ubd.edu.bn (August 2014)

Engineering Rigor and Total Design Rigor “Total Design” is the systematic activity necessary from the identification of a market/user need, to the selling of the successful product/process/service to satisfy that need – an activity that encompasses product, process, people and organization. Engineering education is, by necessity, mostly concerned with the analytical techniques and skills in engineering within a specific discipline or domain (e.g. mechanical, electrical, etc..). The rigorous application of such skills and knowledge to engineering elements is partial design. Industry is concerned with total design: the integration of numerous technical and non-technical disciplines toward a new product/system throughout its useful life. Mis-directed engineering rigor, i.e. too much emphasis on focused engineering solutions, will nearly always give rise to bad total design. Design or product development teams should always include non-engineers.

AN EXAMPLE - The PC The “whole” product requires the integrated contribution of numerous technical and non-technical disciplines throughout the life cycle of the product.

Products of Increasing Complexity

What is a System? S

During the Robot Project you will be Designing A SYSTEM Motor control subsystem–2 motors, individually controlled Forward Reverse Stop Speed from 50 to 100% full speed Obstacle avoidance subsystem–a number of bumpers designed to detect contact with walls and area obstacles Floor Color Detection Subsystem–a light emitting diode to illuminate the floor and a cadmium sulfide sensor to measure the reflections Navigation Light Detection Subsystem –Sensor(s) to detect the navigation light Target Light Detection Subsystem –Sensor(s) to detect the target lights Autonomous Mission Control Subsystem –Software designed, coded and tested to perform a specific mission objective form start to end

A System Is…

Systems Engineering Process Addresses Complex “Products” Products as Shown in this Example from the Telecom Industry

Why do anything at all? “Systems Thinking just Complicates Things.”

Today A Need and an Imperative Exists for… Application Of The Total Design and Systems Engineering Process In The Development and/or Re Re-Engineering of Systems for Commercial and Consumer Products or Services.

New Product Development: A Simple View for a Simple Product

A simplified view of the systems engineering process involving Total Design

Systems Engineering Process: Total Design Phases

Summarizing some Key Concepts Product design involves more than just the engineering disciplines. It is a combination of many technical and non-technical disciplines, that considers all aspects of the product from the start of its design through final disposal at the end of its useful life. This is “TOTAL DESIGN” All design must be considered within the context of how it will affect the entire SYSTEM. All tradeoffs must be conducted to maximize benefits to the SYSTEM it is a part of. Future engineering problems will primarily be systems problems. SYSTEMS ENGINEERS are responsible for transforming a set of requirements into a final operational system architecture.