Before you read this, get ready for a wall of text. I was unable to reply to some of your PMs as I do not have enough posts to do so. So I will just reply here.
They used a normal digital scale. Basically, they measured my height, asked me to get on the scale and calculated my BMI from there. I am 77kg at 172cm. My ideal weight should be around 72kg. However, since I do heavy weight lifting, my weight might have skewed to the heavy side. When I requested the lady to reconfirm with the interviewers whether they can take into consideration my body building activities, I was met with the same reply. I will need to lose 5kg and come back for the interview in 20th April.
That aside, I am very impressed with your progress in losing weight. I would suggest sticking to your current weight as your BMI is 24.4. I am unsure what their required BMI is, but I am assuming the acceptable max at 25. Since I would be at around 25 if I were to lose 5kg.
I would suggest trying to gain a few KGs as I think they might use the range of 19-25 for a healthy BMI. Don't take my word for it though.
To everyone else wondering about skin checks, I would have to agree with KissMyThrone. It seemed they were rather strict. They make you stand straight, with your back to the wall, and have lights shining from the floor up. Apparently this is to allow a better look on your skin complexion. They will ask if you have a tattoo and will check if it is visible with you are wearing your uniform.
For the guys, you will need to roll up your sleeves. For the girls, they will check your complexion thoroughly, the back of your neck, and the top part of your chest. Since that part will show when wearing your kebaya. They may also ask you to go for a check up if you have some rashes around your skin areas. I suggest everyone have a good night's sleep and get ready and be your best on interview day.
To answer some questions about the interview process.
1st Round - Group of 10. Introduce yourself and speak for 1 minute on a subject. Topic of subject varies for every round so it is pointless to memorize what they may ask you. However, one common question asked is definitely "Why do you want to fly with SIA?"
2nd Round - Certificate checks for everyone. Height checks will also be carried out at this point. If the girls seem to be slightly shorter than the requirement, you will be asked to do a reach test. You will need to stand about 1-2 feet from the wall, and reach for a taped line on the wall. Reminder for girls trying out, please do not wear too short skirts. On my interview, there was this poor girl, who was desperately trying to reach the line. Her dress was too short and while trying to reach the line, the dress rode up and well, don't think I need to explain what happened. So please remember, if you are slightly shorter than the requirement but is confident you can reach the line, don't wear short dresses!
3rd Round - 1 on 1 interview. At this point, a certain amount of luck is required. You will either get a helpful interviewer or a strict one. Mine was a rather difficult interview. I got asked questions like :-
1) How do you feel working with children?
2) How will you cope, working with a wide age range of people from 18 - 60?
3) What do you know about the position you are applying for?
4) In your previous employment, give an example of a difficult situation and how you coped.
5) There will be a passage in front of you. Read it out loud. This passage will be a scenario that can happen when you are flying. How would you respond to this problem.
Final Interview - Groups of 6 are formed. This may take awhile as the final interview is a more detailed interview. Groups will be placed in a room for 10-15 minutes. You will need to get to know one another. Find out everything about them. You may need to introduce the person next to you, depending on the interviewers.
For mine, we had to stand up and introduce ourselves. After which, we needed to talk about a topic. Ours was about current affairs. After that, there was a short debate where we were presented with a topic. We were split into two groups of 3. One group would be talking Pro-topic, and the other will be Anti-topic. Finally, we will each stand up and read a passage in front of us. Apparently, this is to assess our announcement making capabilities.
After this, you will either be accepted right away and be briefed or extra checks may be required. Girls may need to try on the Kebaya to see if any adjustments needed. Guys might need to have their BMI checked. At this point, if you do not make the cut at that point in time, but they are interested to take you, you may be put on a KIV list such as I am. I have spoken to many of my SIA friends, and have been reassured that once you have completed their requirements, you have a high chance of landing your dream job.
PS: Dear KissMyThrone - Did they mention sending you an email with information regarding the KIV list and your next interview? Did they also reassure you that you will not need to go through any more interviews and only do the Kebaya check? I myself am unsure of my position also to be honest. I hope things go well for the both of us!
In closing, I would like to encourage everyone not to give up. I know of one ex-SIA crew that tried for 8 times and got through on the 8th try. If they can do it, so can we. Just be yourself, calm your nerves before the interview. For myself, I played CandyCrush to calm my own nerves haha. Whatever works for you! Lastly, do not be afraid, the interviewers are also human beings. Speak confidently and you will do fine!