Some explanations about integration and the language around it! All definitions taken (but paraphrased) from the ISSTD Journal of Trauma and Dissociation (2011).
And just a footnote: There is no “one size fits all” goal. The needs and desires of each system are between the parts and their therapist (if they have one.) Whether a system wants to pursue final fusion or come to a resolution between parts is totally up to them. Both are valid and respected options.