This full version paper derives from clinical study in Massachusetts over an 18-year period. An abridged version appeared earlier. Paper theme: the value of formulation in understanding suicide risk & vulnerability rests on the psychoanalytic theory of dependency & narcissism. A theoretical prologue covers suicide & self objects. Psychodynamic formulation & errors & dangers in clinical assessment are discussed. The suicide case of an Executive illustrates the principles presented. (29 refs.)