Can you look retrospectively at how random paired measurements were?

#1
Dear Sir/ Madam

I wish to know if I can go back and look at my data and determine how random was the pairing of machines used for measurements.
Hopefully it becomes clearer by looking at the table below:

1620332185901.png
Looking at the table you can see that 4 measurements were made on machine 1 indoors (red) while at the same time 4 measurements were made on machine 6 outdoors (red). Similarly 2 measurements on were made on machine 5 indoors (grey) while at the same time 2 measurements were made on machine 2 outdoors (grey). There was no prior planning or thoughts about randomising the pairing. I continued making measurements until all measurements were collected on each machine in both environments. There were a total of 8 machines and on each machine I had to perform 10 measurements in both environments. Sometimes 2 machines were tested indoors while 2 machines were tested outdoors, again no prior planning.

Does anyone have any advice on what I could do to see how random the pairing up of machines was?

I thank you in advance.

Kind regards

haka910