To integrate quality of life assessment with rehabilitation care, some corr
espondence is required between the concepts of quality of life and of rehab
ilitation. A notion of quality of life is presented in which quality is con
ceived as degree of goodness, and life as daily living. Rehabilitation is c
onsidered both a process of adaptation and assistance to that process. Thes
e notions of quality of life and of rehabilitation can together be operatio
nalized through a model of daily living. An individual's appraisal of his o
wn situation in relation to adaptation can be explained, assuming a hierarc
hy of internal standards. Explaining appraisal by others requires external
standards. Both types of appraisal are important grounds for decisions rega
rding assistance. In addition, general ideas on justification of rehabilita
tion as assistance may influence such decisions. The model integrates both
objective and subjective appraisal and ideas on justification into rehabili
tation, thereby offering opportunities for theoretical underpinning of the
practice.