2023 IB DP Design technology Practice Paper with Answers

Technology push occurs when research and development in new technology drives the development of a new product, before any specific market need or consumer demand has been identified. In this scenario, the synthetic silk is created first, and the market applications are sought afterward.

Award 1 mark for the correct answer. Only B is correct as it demonstrates a technology-driven innovation path, whereas A and D are market/user pull, and C is regulatory pull.

Blow molding is specifically designed for producing hollow plastic objects, such as bottles and containers, with narrow openings. It is highly efficient for large-scale production runs.

Award 1 mark for identifying blow molding as the correct high-volume process for hollow plastic bottles. Reject A (used for solid/open parts), B (too slow for high-volume small bottles), and D (mostly for thermosets).

Dematerialization refers to the reduction of the total material and energy throughput of any product and service. Reducing the mass of packaging while maintaining its functionality is a direct application of dematerialization.

Award 1 mark for identifying dematerialization. Other options refer to end-of-life or maintenance strategies rather than reducing raw material use at the source.

A user trial is a research method where a user interacts with a product or prototype in a controlled environment to perform specific, predetermined tasks, allowing researchers to gather detailed usability data.

Award 1 mark for selecting 'User trial'. Naturalistic observation happens in the user's natural environment without intervention, focus groups are group discussions, and literature search is secondary research.

To ensure that almost all passengers can reach the lever, the designer must use the reach limits of the smallest potential users, which is represented by the 5th percentile female. If the 5th percentile female can reach it, then anyone taller (the 50th and 95th percentiles) will also be able to reach it easily.

Award 1 mark for identifying the 5th percentile female as the correct user group for determining reach accessibility.

Embodied energy is the sum of all energy required to produce any goods or services, considered as if that energy was incorporated or 'embodied' in the product itself. This includes mining/harvesting raw materials, transport, processing, and final assembly.

Award 1 mark for the correct definition of embodied energy (C). Reject A (this is operational energy), B (potential/stored energy), and D (waste energy/calorific value).

A mock-up is a full-size or scale representation of a product used specifically for testing, evaluating, and gathering feedback on ergonomics, proportions, and mechanical interaction.

Award 1 mark for selecting 'Mock-up'. Scale models do not imply ergonomic/functional testing capability; aesthetic models focus on visual appearance; instrumental models are used for taking physical measurements.

Timelessness is a key characteristic of classic designs. It describes a product's ability to remain desirable and relevant across generations, staying fashionable and functional long after its original creation, unaffected by temporary trends.

Award 1 mark for identifying timelessness. Reject A (a design that becomes the industry standard), B (styling that mimics past designs), and C (being ubiquitous in daily life, though closely related, it is the endurance of appeal across decades that defines timelessness).

Geoffrey Moore suggests that there is a significant 'chasm' or gap between the Early Adopters (who are technology enthusiasts looking for a strategic advantage) and the Early Majority (who are pragmatists looking for a proven, reliable solution).

Award 1 mark for the correct option (B). No partial marks.

A persona is a profile of a fictional user, constructed from real data gathered during user research, used by designers to represent a specific segment of the target audience.

Award 1 mark for identifying the correct tool (B). No partial marks.

A Flexible Manufacturing System (FMS) is a manufacturing method that consists of machines (such as CNC machines and robots) configured to adapt to changes in product type and production levels dynamically.

Award 1 mark for the correct system (B). No partial marks.

Dematerialization is the reduction of total material volume and throughput of products and services, aiming to meet the same user needs with less material.

Award 1 mark for the correct terminology (A). No partial marks.

To ensure clearance and accommodation for the widest possible range of body sizes, a designer should design for the largest user (the 95th percentile). If the seat is wide enough for the 95th percentile, it will easily fit anyone smaller.

Award 1 mark for the correct percentile selection (C). No partial marks.

A mock-up is a physical model used to represent the design's look and feel, form, or scale, but does not provide complete functionality, which distinguishes it from a prototype.

Award 1 mark for the correct physical model classification (A). No partial marks.

Recycling involves processing used materials into new raw materials, while reconditioning is the process of rebuilding or repairing an existing product to its original functional specification.

Award 1 mark for the correct comparative definition (A). No partial marks.

Classic designs are timeless, transcend passing fashion trends, and maintain an iconic status and emotional connection with users over generations.

Award 1 mark for the correct characteristic of classic design (B). No partial marks.

Suppression in innovation management occurs when an industry, government, or company actively delays, restricts, or prevents an innovation from entering the market, often to protect existing profitable investments, technologies, or infrastructure.

Award 1 mark for selecting the correct definition of innovation suppression (Option B).

Just-in-Time (JIT) is a demand-pull manufacturing philosophy that aims to minimize waste, storage requirements, and inventory holding costs by producing components and products only as they are ordered.

Award 1 mark for selecting the correct characteristic of JIT manufacturing (Option C).

Dematerialization is the reduction of total material and energy throughput of a product or service. This is achieved by redesigning the product to use less material overall while maintaining its original level of function, performance, and utility.

Award 1 mark for identifying the correct definition of dematerialization (Option C).

Personas are hypothetical, research-based profiles of target users created to help designers understand user needs, experiences, behaviors, and goals, which guides more empathetic design decisions.

Award 1 mark for identifying the primary purpose of personas in UCD (Option B).

For clearance dimensions, designers must accommodate the upper limit of the target population's stature (the 95th percentile tallest users) to ensure that at least 95% of users can pass through safely without restriction.

Award 1 mark for identifying the 95th percentile as the correct design limit for clearance (Option C).

An instrumental model is a physical model equipped with sensors, measuring devices, or instrumentation designed to acquire quantitative, scientific data during testing (e.g., wind-tunnel scale model or a crash-test dummy).

Award 1 mark for identifying the correct description of an instrumental model (Option B).

Classic designs are recognized for having a timeless aesthetic quality, surviving market trends, and transcending their original functional purpose to hold cultural and status value over long periods.

Award 1 mark for identifying the correct characteristic of Classic Design (Option B).

Embodied energy is the sum of all energy required to produce a product, which includes the energy used during the extraction of raw materials, processing, manufacturing, and transport to the point of sale.

Award 1 mark for identifying the correct definition of embodied energy (Option B).

To accommodate the vast majority of the population (typically 90%), adjustability ranges are designed to span from the 5th percentile female (the lower bound, representing shorter legs) to the 95th percentile male (the upper bound, representing longer legs). This ensures that individuals from almost all physical statures can adjust the chair to an ergonomically comfortable position.

Award 1 mark for selecting option a. Award 0 marks for any other response.

Retro-styling is a design strategy where a modern product incorporates aesthetic elements and styling cues from a classic design or historical era, while using contemporary technology, mechanisms, and manufacturing processes inside.

Award 1 mark for selecting option c. Award 0 marks for any other response.

A persona is a profile of a fictional, yet highly representative, target user developed from real ethnographic and user research. It helps designers maintain focus on the specific needs, behaviors, goals, and limitations of the actual user group throughout the design process.

Award 1 mark for selecting option b. Award 0 marks for any other response.

In a laboratory environment, users are aware they are being monitored in an artificial, controlled setting. This awareness (often related to the Hawthorne effect) can cause them to perform tasks unnaturally or be more cautious, whereas a natural environment captures authentic, spontaneous behavior.

Award 1 mark for selecting option c. Award 0 marks for any other response.

Disruptive innovation refers to an innovation that creates an entirely new market and value network. It often starts by offering simpler, cheaper, or more convenient alternatives to an underserved segment, eventually improving and displacing established market leaders.

Award 1 mark for selecting option b. Award 0 marks for any other response.

Technology push occurs when scientific research or technological advancement drives the development of new products before an explicit consumer demand or market need has been established.

Award 1 mark for selecting option c. Award 0 marks for any other response.

Dematerialization is the reduction of the total mass of materials and energy throughput required to produce and operate a product, thereby lowering its overall environmental impact while maintaining its original level of performance or utility.

Award 1 mark for selecting option a. Award 0 marks for any other response.

Because Just-In-Time (JIT) manufacturing relies on minimal inventory buffers, any minor disruption in the supply chain (such as transport delays, natural disasters, or raw material shortages) can immediately shut down the entire production line.

Award 1 mark for selecting option c. Award 0 marks for any other response.

Classic designs are characterized by their enduring appeal, which consists of image, status, and obsolescence-defying timelessness. These products remain desirable even as newer technologies and fashions emerge.

Award 1 mark for identifying the correct combination of classic design characteristics (C). All other options represent characteristics that do not define classic design status.

Compatibility is the degree to which an innovation is perceived as consistent with the values, past experiences, and needs of potential adopters. Because the device integrates easily with existing smart speakers and requires no new user habits or subscriptions, it displays high compatibility.

Award 1 mark for identifying compatibility (C) as the driving characteristic. Award 0 marks for incorrect options.

Naturalistic observation involves observing users in their natural environment without any intervention or direct interaction from the researcher. This is the most appropriate method to observe genuine user interactions in real-time without disrupting the flow of travellers.

Award 1 mark for selecting the correct user research method (B). Other options either involve intervention (User trial) or retrospective feedback (Focus group, Questionnaire).

Cradle-to-cradle design is a biomimetic approach where products are designed for closed-loop cycles. By making components easy to separate into technical nutrients (polymers and metals) and using biological nutrients (biodegradable lubricants), the materials can be safely returned to their respective cycles.

Award 1 mark for selecting cradle-to-cradle design (C). Award 0 marks for other sustainability concepts that do not match the closed-loop recovery strategy.

For clearance design, such as doorway heights or legroom, designers must design for the 95th percentile (or the tallest group of users) to ensure that the vast majority (at least 95% of the population) can clear the opening safely without hitting their heads.

Award 1 mark for identifying the 95th percentile (C) as the correct anthropometric design principle for clearance. Award 0 marks for incorrect percentiles.

A persona represents a specific, realistic target user with defined needs and limitations. This prevents the designer from stretching or changing ('elasticizing') the user's characteristics to suit their own design assumptions or convenience during the development process.

Award 1 mark for explaining that a persona establishes a concrete or fixed profile with specific needs and characteristics. Award 1 mark for explaining how this prevents designers from altering or stretching user traits to match their own preferences during development.

Dematerialization reduces the total volume of raw plastic materials needed for manufacturing, which directly lowers carbon emissions during material extraction, transportation, and processing while also reducing post-consumer waste.

Award 1 mark for stating that dematerialization reduces the volume or mass of raw plastic consumed during manufacturing. Award 1 mark for linking this reduction to a clear environmental benefit, such as reduced energy use in transport or decreased waste generation.

Patent suppression involves purchasing and securing the patent rights for an innovative technology but choosing not to commercialize it, which prevents competitors from developing the technology and protects the company's existing product sales from displacement.

Award 1 mark for explaining that a company buys or secures patent rights for an innovation but deliberately does not manufacture or release it. Award 1 mark for explaining that this blocks competitors from using the technology, thereby preventing market disruption and protecting current sales.

A JIT production system schedules materials and components to arrive only when they are needed in the assembly process, which eliminates the waste of excess inventory and minimizes the risk of material spoilage, damage, or obsolescence.

Award 1 mark for explaining that inventory/materials are ordered and delivered only as required for immediate production (reducing storage). Award 1 mark for linking this to the prevention of waste, such as material deterioration, damage, or obsolescence in storage.

Dynamic anthropometric data measures the dimensions of a human body during physical movement and functional tasks, whereas static data only measures fixed, stationary postures. Using dynamic data ensures that the office chair remains comfortable and supportive as users reach, recline, or shift positions during the workday.

Award 1 mark for defining dynamic data as measurements taken during movement/physical tasks compared to static data which is stationary. Award 1 mark for explaining that using dynamic data allows the chair to safely accommodate real movements, adjustments, and task shifts of the user.

Way 1: Utilizing biological nutrients. Unbleached cardboard is an organic, biodegradable material. Unlike polystyrene which remains in landfill indefinitely, cardboard can be easily composted or returned to the biological cycle at the end of its life, restoring nutrients to the ecosystem.

Way 2: Closed-loop technical cycle via the return scheme. By offering a discount, Re-Spool incentivizes consumers to return the spools, creating a dedicated collection stream. This high-purity waste can be directly repulped and remanufactured into new spools or other paper packaging, reducing the demand for new forestry resources and minimizing manufacturing waste.

Award [1] mark for identifying a valid circular economy principle/mechanism and [1] mark for its explanation in the context of the scenario, up to [4] marks total.

- Identification of biological nutrient/compostability [1]. Explanation: Unbleached cardboard can safely compost or biodegrade at the end of life, preventing long-term pollution and enriching soil [1].
- Identification of technical loop/closed-loop recovery [1]. Explanation: The return scheme ensures clean cardboard is collected and recycled back into new spools, avoiding waste and minimizing resource consumption [1].

To transition the kitchen blender business model into a circular economy, the manufacturer can adopt the following three strategies:

1. **Design for Disassembly (DfD) and Modular Design:** The manufacturer can redesign the blender so that components (e.g., motor, blades, jar, control panel) can be easily separated using common tools. This allows consumers or technicians to repair or upgrade specific failed modules rather than replacing the entire appliance, extending the product's overall lifespan and keeping materials in use.

2. **Implement a Product-Service System (PSS) / Rental Model:** Instead of selling the blenders, the company could lease them to consumers or commercial kitchens. Under this model, the manufacturer retains ownership and responsibility for maintenance, repair, and end-of-life processing. This aligns the company’s financial incentives with product durability, ease of maintenance, and resource recovery.

3. **Establish a Take-back Scheme / Reverse Logistics:** The manufacturer can incentivize customers to return obsolete or broken blenders (e.g., by offering discounts on future services or upgrades). The returned products are then disassembled by the manufacturer, allowing valuable components and technical materials (such as copper from motors or high-grade plastics) to be refurbished, remanufactured, or cleanly recycled back into new production runs.

Award [1] for identifying a valid strategy and [1] for explaining/justifying how it supports the transition to a circular economy, up to a maximum of [6] marks.

**Strategy 1: Design for Disassembly (Modular Design)**
- [1] for identifying design for disassembly or modularity.
- [1] for explaining how this facilitates repair/upgrades, preventing the disposal of the entire product when one part fails.

**Strategy 2: Product-Service System (PSS) / Business Model Innovation**
- [1] for identifying a leasing, rental, or subscription service (PSS).
- [1] for explaining how manufacturer ownership incentivizes long-term durability and proper end-of-life management.

**Strategy 3: Take-back Scheme / Reverse Logistics**
- [1] for identifying a take-back or closed-loop recycling program.
- [1] for explaining how this allows the manufacturer to harvest parts for remanufacturing or high-value recycling, keeping materials in the technical cycle.

To implement design for disassembly (DfD) for better end-of-life recycling, the designers can: 1. Use non-permanent joining methods, such as snap-fits or uniform, easily accessible screws, rather than adhesives or ultrasonic welding. This ensures components can be separated quickly without specialized machinery. 2. Reduce the variety of plastics used and clearly mark them with standard recycling codes, preventing material cross-contamination during the sorting process.

Award 1 mark for identifying a valid design for disassembly strategy (such as using reversible fasteners/snap-fits, reducing material types, or labeling plastics). Award 1 mark for explaining how this facilitates efficient recycling at the end-of-life (such as preventing contamination of material streams, or reducing separation time/labor costs).

Paper prototyping is appropriate in the initial stages because: 1. It is low-cost and fast to produce, allowing designers to rapidly iterate and test multiple layout concepts directly with elderly users without investing time in software coding. 2. It minimizes user distraction by focusing feedback on basic usability, navigation flow, and button size rather than aesthetic details like colors and graphic resolution.

Award 1 mark for identifying a key characteristic of paper prototyping (such as low cost, low fidelity, or rapid iteration). Award 1 mark for outlining why this characteristic is beneficial during the initial design phase for the target user group (such as permitting easy modification based on user testing before committing to code).

Standardisation of modular interfaces benefits the manufacturer by: 1. Generating economies of scale, as identical connectors and component housings can be produced in high volumes, reducing the unit cost of manufacture. 2. Simplifying the assembly process and quality control, as standard interfaces require less complex robotic tooling on the assembly line and lead to fewer errors during production.

Award 1 mark for identifying a manufacturing benefit of standardisation (such as economies of scale, reduced tooling variety, or simplified assembly line setup). Award 1 mark for outlining how this benefit directly improves the commercial production process (such as lowering production cost per unit, speeding up assembly times, or reducing defective parts).

To transition successfully to a circular economy model using a Product-Service System (PSS), the premium audio manufacturer should:

1. **Implement a Use-Oriented PSS (Leasing Scheme):** The manufacturer retains ownership of the audio equipment while consumers pay a subscription or rental fee to use it. Because the manufacturer owns the physical assets, they have a strong financial incentive to design durable, long-lasting products.

2. **Provide Regular Maintenance and Modular Upgrades:** As part of the service agreement, the manufacturer conducts regular servicing to prevent failure (product longevity). Furthermore, designing the speakers with modular electronic components allows the service technician to swap out outdated wireless or digital processing chips while retaining the high-quality wood cabinet and acoustic drivers.

3. **Facilitate a Closed-Loop Take-Back Scheme:** At the end of the service contract, the speakers are returned directly to the manufacturer. Because the manufacturer manages the return loop, they can efficiently disassemble the speakers, remanufacture working components, and recycle rare earth magnets, copper coils, and premium materials into new speaker lines (resource recovery).

Award [1 mark] for identifying/suggesting a suitable PSS model (e.g., use-oriented PSS, leasing, or service-driven maintenance contracts).

Award up to [2 marks] for proposing specific design or business strategies within the PSS (e.g., modular electronics for easy upgrading, scheduled technical support, direct manufacturer-led take-back).

Award up to [2 marks] for explaining how these strategies actively support circularity (e.g., extending product lifespan/durability, enabling closed-loop material recycling, or direct component remanufacturing).

*Example of a 5-mark response:*
- **PSS Identification [1 mark]:** Retaining ownership via a leasing-based PSS instead of selling the speakers outright.
- **Longevity Strategy [1 mark]:** Incorporating a modular architecture into the electronic circuits.
- **Longevity Explanation [1 mark]:** This allows the manufacturer to easily upgrade the software/hardware modules during service visits, keeping the speaker technologically relevant and extending its functional lifespan.
- **Recovery Strategy [1 mark]:** Mandating a return policy at the end of the lease agreement.
- **Recovery Explanation [1 mark]:** This guarantees that the manufacturer can reclaim high-value materials (such as neodymium magnets and copper) for direct remanufacturing into new units, preventing waste.

First, Design for Disassembly (DfD) directly enhances product repairability and upgradability. By avoiding permanent adhesives and using standardized fasteners, users or technicians can easily swap out damaged or obsolete modules (such as batteries or screens) without destroying the surrounding housing. This prolongs the primary useful life of the smartphone body and reduces premature disposal of functioning components.

Second, the 'Aegis Loop' product stewardship scheme establishes the necessary reverse logistics and economic incentives. While DfD makes parts separable, stewardship ensures they are actually recovered. Providing store credit motivates consumers to return depleted or outdated modules rather than storing them in drawers or throwing them in general waste. This gives the manufacturer reliable access to a high-quality stream of pre-sorted technical nutrients.

Third, these two systems together close the material loop, supporting a circular economy. The manufacturer can refurbish returned modules directly or cleanly separate materials (such as valuable copper, gold, and polymers) for high-grade recycling. Because the parts were designed for disassembly, the recycling process requires significantly less energy and produces less contamination than shredding conventional, glued electronics. This reduces the need to extract virgin raw materials and minimizes environmental degradation.

Award up to [9 marks] total, structured as three parts of 3 marks each:

Part 1: Design for Disassembly (DfD) and product lifetime extension (Up to [3 marks]):
- [1 mark] for identifying that DfD avoids permanent adhesives and uses standardized fasteners to allow easy separation of modules.
- [1 mark] for explaining that this allows consumers or third parties to easily repair or upgrade individual components (e.g., screens or batteries).
- [1 mark] for linking this to extended product lifespans and the prevention of premature obsolescence of the whole device.

Part 2: Product Stewardship and reverse logistics (Up to [3 marks]):
- [1 mark] for identifying that the 'Aegis Loop' scheme represents a product stewardship model where the manufacturer retains responsibility for the product's end-of-life.
- [1 mark] for explaining that offering store credit acts as an economic incentive for consumers to return modules, solving the collection/reverse logistics hurdle.
- [1 mark] for linking this to a controlled, clean waste stream of pre-sorted components arriving back at the manufacturer rather than entering municipal landfills.

Part 3: Circular economy integration (Up to [3 marks]):
- [1 mark] for explaining how returned components act as 'technical nutrients' that can be refurbished or recycled back into new production.
- [1 mark] for explaining how DfD makes the recycling process itself more energy-efficient and less contaminated compared to standard electronic shredding.
- [1 mark] for linking this to a closed-loop system that drastically reduces the demand for virgin material extraction and eliminates waste.