HIHS DNT PRELIM 2023 (ANS KEY)

1 1 Fig. 1.1 shows a person using a lamp. Fig. 1.1 (a) (i) Give two ways that a designer could collect relevant information about users' needs, to assist when designing a lamp. 1. Online Surveys [1] - This allows for quick collection of data from a large audience. 2. Product Analysis [1] - Analysing existing lamps can provide insight into what users like or dislike. Market Research; Observation [2] (ii) Describe a suitable method of analysing the information collected by the designer. After collecting the information to analyse, • Define the units and categories of the information [1] • Record all relevant data in the appropriate categories [1] • Analyze the results and draw conclusions [1] [3] (iii) A histogram is a suitable method of presenting information collected by the designer. Name two other methods of presenting information. 1. Pie Charts [1] - Useful for showing proportions of different categories. 2. Pictorial Presentation [1] - Useful for presenting data in a visually appealing way. Also accept: Bar Chart, Box and Whisker Plot; Scatter Plot, Venn Diagram [2]

2 (iv) The following information has been collected from potential users of a lamp in response to the question: 'What would be your preferred colour for the lamp?' Colour No. of responses White 5 Black 15 Blue 10 Red 20 Use this information to complete the histogram. [3] 0 5 10 15 20 25 White Black Blue Red 'What would be your preferred colour for the lamp? No. of responses

3 (b) (i) Fig. 1.2 shows a drawing of the preferred red lamp and base. Sketch an idea to show how the lamp's head can be attached to the base. The idea must also allow for angle adjustments. You may use the space in Fig. 1.3 for more sketches to communicate your design. Annotate if necessary. Fig. 1.2 The head of the lamp could be attached to the base using a swivel joint that allows for angle adjustments. Perspective and proportion [1] Design features • Details on how head of the lamp is attached to the base [1] • Swivel Joint allowing angle adjustments [2] • Overall feasibility [2] [6]

4 (ii) The red lamp would be more effective if its brightness could be adjusted. Sketch a modification to your design for part (b)(i), that would enable the brightness of the lamp to be adjusted. Annotate if necessary A dimmer switch integrated into the lamp base would allow the brightness of the lamp to be adjusted. Perspective and proportion [2] Design features • Dimmer switch added to the lamp [2] • Placement of the switch at a suitable location on the lamp [2] [6] (c) Describe two ways of evaluating the design of a lamp. Evaluating against Design Specifications: Compare against the design specifications [1] to see if the requirements have been met [1]. User Testing: Have users