NCEA Level 2 Design and Visual Communication common mistakes
NCEA Level 2 Design and Visual Communication · Understand the traps and how to avoid them.
Producing freehand sketches with no construction lines, so ellipses are lopsided, parallel edges converge inconsistently, and proportions drift between views.
Candidates treat sketching as 'drawing' rather than a measured process and skip centre lines, bounding boxes, and vanishing/axis guides because they seem slow under time pressure.
What to do instead
Before every sketch, lightly block in a bounding box or centre line and a horizon/axis; draw ellipses inside a square guide and check symmetry by flipping the page or holding it to the light. Practise a 10-minute warm-up of boxes, cylinders, and ellipses in perspective before each assessment.
Submitting only one design idea, or several ideas that are cosmetic variations of the same concept (same form, different colour), so the folio shows no genuine divergent thinking.
Candidates fall in love with their first idea or run out of time, and confuse 'more drawings' with 'more concepts'.
What to do instead
Plan for at least three clearly different concepts that differ in form, function, or user experience, and annotate each with what problem it solves. Use a structured ideation method (e.g. SCAMPER, morphological analysis) to force divergence before refining.
Presenting final renders and models with no evidence of testing, feedback, or iteration, so the design appears to have arrived fully formed.
Candidates see the folio as a portfolio of pretty outcomes rather than a record of design thinking, and delete or hide failed attempts.
What to do instead
Keep and annotate rejected ideas and mock-up photos; show at least one cycle of 'test → feedback → change → retest' with dated evidence and a short statement of what changed and why. Treat the folio as an argument, not a gallery.
Using instrumental (technical) drawings with wrong line weights and line types - outlines, hidden detail, centrelines, and dimension lines all drawn the same thickness, or hidden lines shown as solid.
Candidates focus on getting the shape right and treat line conventions as decoration; they have not internalised the standard hierarchy.
What to do instead
Memorise and apply the hierarchy: thick continuous for visible outlines, thin continuous for dimension and projection lines, dashed for hidden detail, chain for centrelines, and thin continuous for hatching. Check every drawing against a one-page line-type checklist before submission.
Omitting or misplacing dimensions on working drawings - missing overall sizes, dimensions repeated on multiple views, or dimensions placed inside the object rather than outside with extension lines.
Candidates assume the reader can scale from the drawing, and they run out of space so they squeeze dimensions wherever they fit.
What to do instead
Apply the rule that every feature is dimensioned once, on the view where it is clearest, with the overall length, width, and height always given. Use extension lines offset from the object, keep text readable from the bottom or right, and cross-check against a dimensioning checklist.
Drawing a 3D object in one-point or two-point perspective with the wrong number of vanishing points for the view, or placing the horizon at eye level inconsistently so verticals and horizontals do not align.
Candidates copy a 'perspective look' without understanding the geometry of the station point, picture plane, and horizon, and mix conventions within one drawing.
What to do instead
Decide the viewpoint first: one-point for a face-on view, two-point for a corner view, and keep all verticals vertical for both. Set the horizon at the viewer's eye height and check that every receding edge converges to a marked vanishing point.
Ignoring the brief's constraints - specified materials, dimensions, user group, budget, or sustainability requirements - and designing something that would fail the stated need.
Candidates skim the brief and design from personal preference, then retrofit justifications at the end.
What to do instead
Rewrite the brief as a short list of hard constraints and success criteria before sketching, and annotate each concept against them. Include an explicit evaluation table at the end that scores the final design against every constraint.
Producing presentation boards or layouts with cluttered composition: no clear visual hierarchy, inconsistent type sizes and fonts, and text that is hard to read against busy backgrounds.
Candidates add every drawing and note they made rather than editing, and choose decorative fonts and colours without considering legibility.
What to do instead
Limit the board to a clear reading path (title → concept → development → final), use a maximum of two typefaces with a defined size hierarchy, and keep body text on calm backgrounds. Print or view at actual size and check legibility from a metre away before finalising.
Describing materials and manufacturing processes vaguely ('made of plastic', '3D printed') without naming a specific material, thickness, finish, or joining method appropriate to the design.
Candidates lack familiarity with real materials and processes and use generic terms to avoid being wrong.
What to do instead
Build a personal reference sheet of common materials (e.g. plywood, acrylic, aluminium, PLA/PETG) with properties, typical thicknesses, and joining methods, and specify these on drawings. Justify each choice against function, cost, and sustainability in a short annotation.
Leaving annotations and evaluations generic ('looks good', 'works well', 'could be improved') instead of referencing specific design decisions, evidence, and the brief's criteria.
Candidates write annotations as a final afterthought and lack a vocabulary for evaluating design against criteria, so they default to vague praise.
What to do instead
Use a sentence frame for every annotation: what was done, why, what it achieves against which criterion, and what would change next. Replace every adjective with evidence - a measurement, a user comment, a test result, or a comparison to another concept.