Question: Two similar models, A and B, are to be produced on a mixed model assembly line. There are four workers and four stations on the line (Mt = 1 for i = 1, 2, 3. 4). Hourly production rates for the two models are: for A. 7 units/hr and for B, 5 units/hr. The work elements, element times, and precedence requirements for the two models are given in the table below. As the table indicates, most elements are common to both models. Element 5 is unique to model A, and elements 8 and 9 are unique to model B. Assume E = 1.0 and E, = 1.0.
(a) Develop the mixed model precedence diagram for the two models and for both models combined.
(b) Determine a line balancing solution that allows the two models to he produced on the four stations at the specified rates.
(c) Using your solution from (b), solve the fixed rate model launching problem by determining the fixed rate launching interval and constructing a table to show the sequence of model launchings during the hour.
