Design methodologies

Designing an optimal user interface is a careful balance between many different factors. A sound user interface is not about the quality of the graphics or the colour pallet chosen, rather it is about its effectiveness, the ease and efficiency with which users can achieve their objectives safely and consistently. 

The five goals of user interface design are often cited as  

Of course not all users prioritise these characteristics equally. An expert user is more likely to focus on efficiency whilst a beginner will require leamability and memorability. Errors in safety-related HIT systems frequently translate into the propensity to trigger hazards. On this basis, all HIT system designers need to prioritise managing error occurrence as a design objective. 

Products with suboptimal user interfaces can be difficult and expensive to fix once they are in live operation. Not only do changes need to be carefully implemented but training materials and user documentation are also likely to need a refresh. It is far more efficient to get the user interface right from the start. Similarly manufacturers need to have an appreciation that poor interface design cannot be realistically be remedied by additional training. As discussed in Sect. 2.6 most slips and lapses simply cannot be addressed through the provision of advice or guidelines. 

Sound user interface design requires engagement and close cooperation of representative users. In practice it is insufficient to simply hold a focus group to ask users what their requirements are. A better approach is to formally implement a user-centred design process. Here a small number of representative users are convened and comments are solicited on candidate designs. As the project progresses designers need to offer prototypes or test enviromnent for the subjects to try out the product. 

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Phase transfer catalysis has been used with success to prepare N- substituted pyrazoles (78MI40403, 79MI40408, 70JHC1237, 80JOC3172) and this procedure can be considered the simplest and most efficient way to obtain these compounds. Experimental design methodology has been used to study the influence of the factors on the reaction between pyrazole and -butyl bromide under phase transfer conditions (79MI40408). 

Andreasen, M. M. 1991 Design Methodology. Journal of Engineering Design, 2(4), 321-335. 

Klit, P., Jensen, F. and Ellevang, P. 1993 Reliable Design Methodology - the use and misuse of reliability data in the design process. In Proceedings ICED 93, The Hague, 1156-1164. 

The use of pilot-plant filter assemblies is both eommon and a elassieal approaeh to design methodology development. These eombine the filter with pumps, reeeivers, mixers, ete., in a single eompaet unit and may be rented at a nominal fee from filter manufaeturers, who supply operating instruetions and sometimes an operator. Preliminary tests are often run at the filter manufacturer s laboratory. Rough tests indicate what filter type to try in the pilot plant. 

Design methodology consists of determining capacity, approximate sizes of particles settled and horsepower requirements for pumping. The flowrate of a... 

This valuable reference volume conveys a basic understanding of chemical reactor design methodologies that incorporate both scale-up and hazard analysis. It shows readers how to select the best reactor for any particular chemical reaction, how to estimate its size, and how to obtain the best operating conditions. 

Design methodology is the systematic description of the technical design process of industrial air technology as an elementary part of the whole life cycle of the industrial plant. 

Local ventilation systems (see Fig. 2.2) are used for local controlled zones. These systems are air technological methods for local protection. Primarily, local protection should be made using process methods such as encapsulation or process modification (see Design Methodology, Chapter 3). Another use for local ventilation systems is source capturing. 

Environmental issues are being addressed more and more heavily in today s and future society. Thus, it is natural that in industrial processes and in their design, environmental effects are also considered over the whole life cycle. The life cycle of the production process can be divided into four parts design, construction, operation, and end of the process. Each part consists of different tasks. Design methodology is a part of the whole process from starting point to grave. The life... 

The design methodology is a description of a technical design process that covers the whole lifetime of the production process. Most decisions concerning industrial ventilation are made at the design stage, and are reflected in construction, operation, maintenance, service, etc. 

The first and most important aim of design methodology is to produce, by systematic analysis, a description of the design procedure that is commonly accepted and used in every process in different markets. The idea is to make a description of the technical process of design in other words, to answer two questions ... 

The design methodology does not take a position on who does this or that task. That is part of administrative or commercial flow, which varies in different parts of the world and even in different projects in one country. 

A decision tree for Design Methodology is illustrated in Fig. 3.2. Each step in the tree is explained briefly below. The steps have also their own subtrees, which are described separately. 

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