Date | May 2018 | Marks available | 8 | Reference code | 18M.1.SL.TZ0.4 |
Level | SL | Paper | 1 | Time zone | no time zone |
Command term | Discuss | Question number | 4 | Adapted from | N/A |
Question
Exoskeletons1 for workers
Many jobs in modern manufacturing still require human workers, and many of these jobs involve lifting and carrying heavy loads. Some jobs require workers to maintain unnatural positions for a long period of time or hold tools for many hours. Workers doing these jobs are exposed to possible injuries, resulting in sick days or even a shortened work life. The Robo-Assist project is an attempt to address these problems (see Figure 2).
Robo-Assist is a lightweight powered exoskeleton that uses motors and sensors to enable workers to bear only a small part of the weight of any load they are carrying.
Robo-Assist has three supporting modules: one for the arms to help with lifting, one for the torso2 to support the back and spine, and one for the legs to support the inner thigh so lifting is easier.
Figure 2: The Robo-Assist exoskeleton
A group of designers and engineers worked for three years to develop the prototype of the Robo-Assist arm module shown in Figure 3.
Figure 3: Prototype of Robo-Assist arm module
In addition to preventing injuries, exoskeletons can use global positioning systems (GPS) to collect data about a worker’s location, vital signs, and neural signals, as well as other information relating to the user. Overall, Robo-Assist should make workers’ jobs easier and faster. The ultimate goal is to make Robo-Assist available for sale to industries for them to purchase for their workers.
1 exoskeletons: external wearable frameworks that strengthen a human’s natural physical ability
2 torso: the part of the human body that does not include the head, arms or legs
Identify two components of a global positioning system (GPS).
Identify two key stakeholders involved in this project.
The research team developing the Robo-Assist project used quantitative and qualitative data to gather information relating to the user.
Explain why the research team collected quantitative and qualitative data.
Other than for the prevention of injuries, discuss the impacts on workers and employers of the use of exoskeletons in the workplace.
Markscheme
Answers may include:
- Satellites
- Receivers
- Ground stations
Award [1] mark for each component of a global positioning system (GPS) identified up to a maximum of [2] marks.
Answers may include:
- Manufacturer of the exoskeleton
- Workers
- Programmers
- Designers
- Employers (in the workplaces where Robo-Assist is used, i.e., the company purchasing the Robo-Assist)
Award [1] mark for each stakeholder identified up to a maximum of [2] marks.
Answers may include:
Quantitative data:
- can be easily used for the statistical analysis/may be statistically significant
- is largely objective
- can be gathered relatively easier through surveys or questionnaires to show main trends/categorization/classify potential users
- does not require a skilled interviewer.
Qualitative data:
- provides more nuanced information than quantitative data / the questionnaire may be too crude
- may provoke new areas for research (rather than being set by a survey)
- allows the research team to identify patterns in the data (inductive reasoning)
- may be able to elicit more sensitive/personal information.
Reasons for the collection of both types of data:
- Collecting only quantitative data may not drill down deeply enough into the potential users of the Robo-Assist.
- Collecting only qualitative data may lead to a small sample size, as the amount of time to carry out interviews/observations/focus group discussions may be limited by the available time/budget for the research to be carried out.
- The two forms of data collected may complement each other and provide more usable information than either method on isolation.
- This collection method may fit with the requirements and/or skill sets of the research team.
Keywords: quantitative, qualitative, classification, categorization, statistically significant, nuance, trends, patterns
Possible impacts include:
- Employers might increase their expectations of workers, which could lead to more injuries, i.e., dehumanize workers (values, change).
- Workers might push themselves because the exoskeleton seems to make work easier, possibly resulting in injuries (values).
- Exoskeletons could collect data on the user, including private information.
- If a person is injured by someone wearing an exoskeleton, who is responsible/accountable? The manufacturer of the exoskeleton, the user, the company that purchased it?
- Older workers can stay in jobs longer.
- Productivity may improve.
- Will workers accept the technology? Is it legal? Does it meet regulations?
- Injured workers may be equipped with the exoskeleton and return to work earlier (values).
- It saves companies money/reduces sick time (values).
- Cost to employer of purchasing/maintaining exoskeleton.
- Cost to employer of training workers to use the exoskeleton.
- Reliance on the technology: What happens if it breaks down? Can workers still do their work?
N.B.: Some students may develop the impact of injuries on the workers or the companies. If they go beyond what is already stated in the question, this is an acceptable approach.
In part (c) of this question it is expected there will be a balance between the terminology related to digital systems and the terminology related to social and ethical impacts.
Keywords: exoskeletons, health, business organization, regulations, responsibility, accountability, judgement, reliability, sensors, sensory inputs, data, change, systems, values
Refer to SL/HL paper 1, part c markbands when awarding marks. These can be found under the "Your tests" tab > supplemental materials > Digital society markbands and guidance document.