FWIW, the hairstyles above reflect two different approaches to groups. The shorter bob at the bottom only uses two groups on the skullcap, which is simpler in many ways, although it can have its own challenges. (In this case, I missed working on the lower hair in front of the ears, so it's sticking pretty much straight out. Don't know why it didn't drape more though.)

The upper two share a skullcap base that has ten groups.

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Hardware: AMD Ryzen 9 3900X/MSI MAG570 Tomahawk X570/Zotac Geforce GTX 1650 Super 4GB/32GB OLOy RAM

Software: Windows 10 Professional/Poser Pro 11/Photoshop/Postworkshop 3