Which chart are you referring to?

Student or Learner
Hi,
I know that the British phonetic chart is divided into three parts: the monophtongs, the diphtongs and the consonants. But is there a reason why the monophtongs' part, for example, is organized the way it is? /i:/ is the first and then /ɪ/ and then...
Are they organized arbitrarily?
Thanks a lot.
Which chart are you referring to?
I mean the British phonetic chart that is divided into three parts. I can't include a picture, because I haven't reached 10 post yet.
If you mean this chart, then the location of the symbol represents the height of the tongue and the part of it which is raised in the production of that vowel, in a stylised side view of the mouth.
Thanks. I mean this: https:// (without space) encrypted-tbn0.gstatic dot com/images?q=tbn:ANd9GcRXnoK1d8qbdydirrn4fFuYiL-yS8rDdW5Otr0qutscziOYPu5Gcw
I appreciate your help.
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