Mike is a delivery driver for FedEx. He drives around town, delivering packages

to local business and homes. The current package Mike is delivering is supposed

to go to Ms$.$ M$.$ Mouse at $114$ Daisy Drive. However, Mike delivered the

package to $112$ Daisy Drive. The package did not require signature confirmation,

so Mike simply left the package on the front porch.

$1.$ Formulate this scenario as a THERP model. At each branch in the model, estimate the

probabilities of occurrence.

$2.$ Based on your model in part $1,$ what is the overall probability of error?

$3.$ Suggest two design improvements that would reduce error in this scenario.

$4.$ Develop new estimates of your THERP probabilities based on your design

improvements. What is the new overall probability of error?

$5.$ What level of error would you define as acceptable for this scenario? Why? Would your

acceptable level of error be different for the scenarios you did not choose?