The realisation sequence
Realisation is where the design is made, in order: prepare (cut to size, plane a reference face), mark out, cut and shape/form, fit, join and assemble, finish, and test against the specification. The rewarded skill is choosing the RIGHT process for each material — line-bend acrylic on a strip heater, saw wood, braze metal — not one favourite process for everything. Name the specific tool at each step and match it to the material.
Marking out — datum and the right tool
Accuracy is decided at marking out: mark badly and every later cut is wrong. Work from a datum — one flat, straight reference face/edge prepared first — so errors do not accumulate. Then separate the tool that guides a line from the one that makes it: a rule or try-square is a GUIDE, while the line is cut by a scriber (metal/plastic), marking pen/pencil (wood) or dividers (arcs). Naming the guide when the marking tool is asked for is a lost mark.
Select the process; test throughout
Choose a process suited to the material. Cutting: tenon/coping saw for wood, hacksaw for metal, laser or piercing saw for sheet plastic — and an enclosed shape needs a pilot hole first. Shaping: planing, filing, line-bending thermoplastics, bending metal round a former. Joining: solvent cement for acrylic, PVA for wood, brazing/rivets for metal. Finishing: sand with the grain, then a finish. Test throughout — check sizes and function as you go.
Drawn from real examiner reports.
Naming the guide, not the marking tool
Asked to name the tool that marks out a line, many candidates name a steel rule or try-square. Those are GUIDES — a straight edge to draw along — they do not make the mark. The line is made by a scriber (metal/plastic), a marking pen or pencil (wood); arcs by dividers. Name the tool that leaves the line; keep rule/try-square for the word GUIDE.
Marking tool asked, guide named (s23 P31 Q12b, s23 P32 Q13b, w23 P31 Q6b).
Vague process or default to a laser cutter
Two heavily reported faults in the manufacture part. First, vague descriptions — "cut it out", "join the parts" — miss the marks reserved for correctly named tools (which saw, file, adhesive). Second, over-reliance on one drilled answer, usually "laser cutter", applied regardless of suitability. Most tasks need hand processes; name the tool that fits the material.
Vague verbs / laser-cutter default (s23 P11–P13 Q(g); s23 P32/P33).
Enclosed cut with no pilot hole
To remove an enclosed shape (a window or slot) the blade cannot start from the edge. A pilot hole is drilled first, inside the waste, so a piercing/coping blade is threaded through and sawn round the line. Naming a saw with no pilot hole — or a band saw, whose continuous loop cannot be threaded through — loses the mark. Sequence: mark out, drill, thread, saw, clean up.
Enclosed cut needs a pilot hole first (s23 P32 Q6; w23 P31 Q13a).
Saying compass instead of dividers
Arcs and circles on a workpiece are marked with dividers, which step off a distance and scribe the arc into the material. Candidates often write compass — a paper-drawing instrument — which earns nothing here. Reserve compass for a drawing on paper; on wood, metal or plastic the marking-out tool for arcs is dividers.
Compass given instead of dividers (w23 P31 Q6b).
Vague file and saw names
Marks for tools go to the exact name. "Curved" or "rounded" file is rejected — name the half-round, round/rat-tail or hand file (with its safe edge). The same applies to saws: tenon for straight cuts in wood, coping/piercing for curves and internal shapes, hacksaw for metal. A general word for a specific tool does not score.
Exact file/saw names required (s23 P32 Q13b; w23 P32 Q6).
Rule or try-square makes the line
A testable wrong belief: that the steel rule or try-square is the tool that "marks out" the line. They are only GUIDES — a straight edge to work against. The line is MADE by a scriber (metal/plastic), a marking pen/pencil (wood) or dividers (arcs). The rule sets the position and the square keeps it at 90°, but neither leaves the mark.
No datum to measure from
Measuring each size from a different edge lets small errors accumulate, so parts do not fit. A datum — one flat, straight reference face/edge, prepared first — is where every measurement starts, keeping the marking out accurate. The datum face is poorly understood: candidates who ignore it produce components that are out of square and out of size.
Datum face poorly understood (s23 P31 Q4).
Name tools and give process-specific safety
Name the specific tool for each step (tenon saw, half-round file, strip heater), not a vague verb, and match it to the material. When a safety question bars PPE, give process-specific precautions — clamp the work, guard in position, emergency stop — not "goggles".
Show the enclosed-cut sequence
For an internal shape, write the order out: mark out, drill a pilot hole in the waste, thread a piercing/coping blade through, saw round the line, then clean up the edge. State that a band saw cannot do it. The sequence earns the marks, not just naming a saw.
Match the process to the material
Do not apply one favourite process to everything. Line-bend acrylic on a strip heater, saw wood, bend metal round a former, vacuum-form thermoplastic sheet. A wrong process — a strip heater on steel — scores nothing; pick the process the material allows.
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