According to the job characteristics model,contextual factors at Starbucks include salary and benefit programs,interpersonal relations,travel requirements,and work conditions.

The job characteristics model considers five core job characteristics (skill variety, task identity, task significance, autonomy, and feedback) and three critical psychological states (experienced meaningfulness of the work, experienced responsibility for outcomes of the work, and knowledge of the actual results of the work activities), but also acknowledges that contextual factors like salary, benefits, interpersonal relations, working conditions, and so on can influence employees' motivation, satisfaction, and performance. Hence, the contextual factors mentioned in the question (salary and benefit programs, interpersonal relations, travel requirements, and work conditions) are relevant in the job characteristics model applied to Starbucks or any other organization.