The study was performed by using a multiple paged questionnaire to survey the three different manufacturing
assembly methods at the manufacturing assembly facility. Data was collected several times over a period of time;
therefore a longitudinal study was conducted. These three different manufacturing assembly methods were exhibited
and displayed by three distinct individual manufacturing assembly lines. One of these manufacturing assembly lines
consisted of the employee subjects of interest which was called the study group. The other two manufacturing
assembly lines served as the control groups for the study group; these two manufacturing assembly lines were called
the control group 1 and the control group 2.
The study group employee’s manufacturing assembly method consisted of utilizing an overhead powered
conveyor system in order to assemble the product.
The control group 1 employee’s manufacturing assembly method consisted of utilizing automatic guided vehicles
(AGVs) in order to assemble the product.
The control group 2 employee’s manufacturing assembly method consisted of utilizing a gravity roller conveyor
(i.e., a manual push line) in order to assemble the product.