A single-station assembly machine is to be considered as an alternative to the dial-indexing machine in Problem 17.4. Use the data given in the table for that problem to determine
(a) Production rate,
(b) Yield of good product (final assemblies containing no defective components), and
(c) Proportion uptime of the system. Handling time to load the base part and unload the finished assembly is 7 sec and the downtime averages 1.5 min every time a component jams. Why is the proportion uptime so much higher than in the case of the dial-indexing machine in Problem 17.4?
Problem 17.4
A dial indexing machine has six stations that perform assembly operations on a base part. The operations, element times, q and m values for components added are given in the table below (NA means q and m are not applicable to the operation). The indexing time for the dial table is 2 sec. When a jam occurs, it requires 1.5 min to release the jam and put the machine back in operation.

Station Operation Add part A Fasten part A Assemble part B Add part C Fasten part C Assemble part D Element time 4 sec 3 sec 5 sec 4 sec 3 sec 6 sec 0.6 NA 0.8 0.015 NA 0.01 0.02 NA 0.01 4 NA 0.5