OCR A Level Design Engineering Paper 2 Mark Scheme

Download the official OCR A Level Design and Technology: Design Engineering H404/02 Problem Solving in Design Engineering mark scheme for the June 2025 examination series. This examiner-authentic OCR PDF contains complete marking guidance, worked engineering calculations, indicative content, level-of-response descriptors and official OCR assessment criteria for the Design Engineering problem-solving paper.

The mark scheme provides detailed examiner-approved answers for autonomous disaster-response vehicles, robotics engineering, pneumatic actuation systems, manufacturing methods and programmable control systems. Students can study official OCR guidance for evaluating technical and ethical issues surrounding autonomous rescue vehicles, including robustness, navigation systems, sensor integration, communication reliability, safety, accountability and long-term societal impacts.

Engineering-calculation sections contain fully worked solutions for rubber-track length calculations, gearbox velocity ratio calculations, robot output-speed determination, mechanical advantage and pneumatic-cylinder force calculations. The document also includes complete guidance for ultrasonic-sensor flowcharts, programmable-control logic, pneumatic fork mechanisms and linkage design for the Scout search robot project.

The mark scheme explains OCR’s official level-based marking approach for extended-response questions involving collaboration between engineering specialists, prototype development, testing, manufacturing systems and batch-production methods. It also contains detailed indicative content for aluminium-sheet manufacturing processes including blanking, piercing, bending, rolling, TIG welding, riveting, jigs, dies and structural reinforcement techniques.

Students can use this mark scheme to understand exactly how OCR awards marks for engineering reasoning, calculations, technical communication, manufacturing analysis and systems design. OCR additionally explains marking principles including benefit of the doubt, follow-through marking, contradictory responses and level-of-response assessment methods used during live examination marking.

This OCR H404/02 June 2025 mark scheme is essential for self-marking, robotics revision, engineering-calculation practice, manufacturing-process analysis and understanding examiner expectations for high-band OCR Design Engineering responses. Perfect for students preparing for the 2026 OCR examination series, teachers designing mock assessments and tutors supporting OCR A Level Design Engineering revision. Pair it with the matching OCR H404/02 June 2025 question paper for complete examiner-guided preparation and OCR-standard assessment practice. Fully compatible with desktop, tablet and mobile PDF viewing.

This document is designed for OCR A Level Design Engineering students preparing for the 2026 examination series, especially candidates studying robotics, mechanisms, manufacturing systems and engineering mathematics. It is particularly useful for learners aiming to improve technical problem solving, engineering calculations, manufacturing analysis and understanding of OCR examiner expectations.

It is also highly valuable for teachers, tutors, revision-course providers and independent learners who require official OCR marking guidance, worked solutions and assessment criteria for classroom teaching, mock examinations, robotics projects and targeted OCR Design Engineering revision.