Shift in Focus Is Expected At Coca-Cola
M Douglas Ivester, who will likely be named chief executive of Coca-Cola Co following death of Roberto C Goizueta, is expected to focus more attention on developing enormous global network that Goizueta built up during his 16-year reign; analysts agree that Ivester will shift company's emphasis from expansion to exploiting its existing dominance around world; Goizueta will be tough act to follow--during his tenure company's profits rose sixfold, revenue trebled and market capitalization exploded from $4.3 billion in 1981 to $145 billion in 1997; Ivester must prove to investors that he can nurture creative talent and create same consistent double-digit earnings performance in time when strong dollar is reducing Coke's overseas profits; photo (M)