In a letter, a manufacturer said that delivery would resume once a replacement part arrived. The letter gave no arrival date and made no promise about the week in which production would restart. The retailer nevertheless told customers that their orders would ship the following Monday. When the part arrived two weeks later, the retailer accused the manufacturer of breaking a dated promise. The manufacturer replied that the letter had identified a dependency, not a timetable. The retailer's expectation may have been understandable in light of earlier deliveries, but it went beyond what this particular message committed the manufacturer to doing.