Team is feeling stressed in getting things done in a week
If you are struggling to complete stories in a week then you could consider trying to make the user stories smaller. If that is not practical then a shift to a 2 week sprint makes sense.
The team has just 3 days focused working frame where they can completely dedicate their time. Half of Monday and friday being utilized for planning and review/retro
The Scrum Guide recommends the length of ceremonies is reduced based on the sprint length. For example, sprint planning is time-boxed to 8 hours for a 4 week sprint, so we would expect it to be around 2 hours for a 1 week sprint. I would also expect the retrospective to be around 45 minutes and the sprint review around 1 hour when doing 1 week sprints.
If you decide to go for a 2 week sprint then typical ceremony lengths might be time boxed to:
- Sprint planning 4 hours
- Retrospective 1.5 hours
- Sprint review 2 hours
Remember that the time-box is a top limit to the time you should spend. You can spend less time than this.
I have found that some teams like to spread out the Scrum ceremonies over a couple of days while other teams prefer to compress them in to one day. You may want to consider doing your review and retrospective in the morning and then sprint planning after lunch on the same day.
I would also recommend you consider moving your sprint start/finish away from Monday/Friday. There are a number of disadvantages of holding Scrum ceremonies on those days:
- People are often tired by Friday and find it more difficult to focus
- Mon/Fri are the most common days to take holiday
- Monday is statistically the most common day that people are off sick
- Mon/Fri are common days to work from home