Microsoft uses GitLab to streamline their software development process. GitLab receives on average 1 code review request every 1/50 seconds, with a standard deviation of 1/50 seconds, and processes it using its single powerful computing unit, which can run code review in 1/80 seconds per request(with a standard deviation of 1/160 seconds).Requests will be pending indefinitely until they are processed.

Q1. On average, how many seconds does it take between the code review request being submitted and it going through the end of the code review process? Keep 4 decimals.

Q2. On average, how many requests (2 decimals) are waiting to be processed at any given time?

Q3. Microsoft has added one additional identical computing unit, making a total of two computing units. Incoming code review requests would still join the same single queue but will be routed to the next available computing unit. How many computing units are idle on average? Keep 4 decimals.

After processing, some requests would be added to a quality assurance(QA) process. The QA team works from 7am to 7pm daily. 

The following data reports QA processing for each of the ten requests processed on August 1 including the time each request joined the QA process and its completion time.

Request         Arrived                  Completed

#1                      7am                           3pm

#2                      7:30am                  10:30am

#3                      8am                         12pm

#4                      8am                           5pm

#5                      8:30am                    10:30am

#6                      9:30am                     3:30pm

#7                      11am                          4pm

#8                      11:30am                   6:30pm

#9                     1:30pm                      6:30pm

#10                    3:30pm                     6:30pm

Q4. What is the average flow rate of requests in this process (requests / hour; 2 decimals)?

Q5. On average, how many requests are in the QA process? Keep 2 decimals.

Answer rating: 100% (QA)

1 To calculate the average time it takes between the code review request being submitted and it going through the end of the code review process we need to consider both the time it takes for the requ... View the full answer