The purpose of this document is to identify the quantitative qualities that this current design of the Emily Carr Lecture chair possesses in order to identify key changes that will need to be taken in order to make this product more ergonomic for the current users. We feel that the current design is outdated and does not take into account various measurement that should be implemented in order to create a more comfortable learning environment. Most lectures last anywhere from 1-3 hours, and the current design is not suitable for sitting for that time period. The plan for this ergonomic study is to enhance the chairs features, therefore enhancing the overall lecture experience.
The current chair is static because it involves heights, clearances, and breadths, though there are moving parts that involve reach which. The design is non-adjustable, but we would like to create a dynamic space that can be adjusted for each users preferences. The Emily Carr lecture chairs are designed for people who are right handed. One of the purposes of this document is to identify the different users of this workstation using the user profile to determine what kind of users using this workstation. For example, Josiah and Lauren are two students who use this lecture chair regularly; Josiah is left handed and Lauren is right handed. Being two very different users that both occupy these workstations, we are able to bring our different views of how this workstation can work for people coming from opposite backgrounds.
If we had the opportunity to redesign this workstation, we would create it to be a more dynamic design. Emily Carr University has a wide ethnographic with many international students. since this is a shared workstation, making it adjustable will be important to allow for a wider variety of people to be comfortable.
Below are photographs of the current design from various angles.
We have identified seven relevant body dimensions that we think are relevant to this workstation. These seven different body dimensions were chosen because we believe that they can be used to determine the current dimensions of the workstation. The six chosen body dimensions are: sitting shoulder height (backrest height), popliteal length, elbow to elbow breadth (armrest width – individual), hip breadth (seat width), Abdominal depth (Distance between backrest and nearest point of table), and the height of maximum lumbar curvature (lumbar support).
This workstation is a static product. This means that the measurements used of the body to measure the dimensions of the table do not change. The position that the user sits in is a very static position and is usually in this position for a long period of time. This is a product that includes breaths, heights, and clearances. static dimensions were measured. There is minimal blood flow when using this product and causes an increased lactic acid build up; This is one of the reasons why when you stand up from this workstation your body is sore.
When opening this workstation it is dynamic in a way because there are moving components. Reach and range of motion is also involved. The seat folds up and the table also folds into the side where the armrests are. This will be important to examine when determining how we will want to improve the design.
Justification for the percentage of population to be accommodated
To determine the percentage of population we need to accommodate for, we have used and analysed our user profile. We have realized that ethnographic will play a key role in determining factors such as size, weight, height which affect how comfortable the user may be in this workstation. We want the chair to be used by as many people as possible, and so we will try to accommodate as many ergonomic measurements as possible.
In our new design, we are going to try to accommodate for the as many people as we can. We do this by widening and creating moveable parts to allow for a more customized workstation depending on the user.
These are the anthropometric estimates for males and females with ages ranging from 18 to 64. We used people size to find the 5th %le, the 50th %le, and the 95th %le. To calculate the SD (standard deviation), we used the 95th %le and subtracted the 50th %le from it. Using the found number, we then divide 1.65 to find the standard deviation. This is an appropriate table choice because it relates to the measurements that we took from the workstation in the emily carr lecture hall. We used people size to find all of our percentiles so that there are consistent finding.
Knowing what you need to accomplish and figuring out how you need to feel in order to complete that task is important when thinking about the type of clothes that will help make you feel that way. A large jacket or excessive outerwear could affect how comfortable the user is in this workstation. They may find it hard to move around and shift from side to side because there is a limited amount of space that the user has to move around in. This would happen mainly in the winter/colder months. The type of clothing a user wears has a great impact on the task that is being completed. The type of clothing that is worn affects the body dimensions of the user.
Current and recommended dimensions for each of the six measures, the percentiles of the user population they accommodate, and a justification of choice of percentile cut-offs.
Below is a sketch of the recommended design based off the provided research.