Which of the following should be assessed in a consultation checklist for perm services?

In the context of perm services, assessing hair type and health is crucial because it directly influences the type of perm that can be applied and the overall outcome. Understanding the hair's texture, porosity, density, and overall condition allows the stylist to determine the proper perm solution and rod size, ensuring the best possible result for the client. For example, fine or damaged hair may require a milder solution or an adjusted technique to prevent excessive damage, while thick or coarse hair might need a stronger solution for effective results. This assessment is essential for both the safety of the client's hair and achieving the desired curl pattern.

Other aspects, like hair color preferences, styling frequency, and shampoo brands, while important for overall client satisfaction and care recommendations, are secondary to the foundational assessment of hair type and health when preparing for perm services. These factors do not directly affect the technical process of applying a perm.