If the following jobs are sequenced according to the DDATE rule then the mean completion time (in days) for all jobs is (assume zero for today's date) 
Definitions:
Capacity Management
Capacity management is the process of planning and controlling the resources needed to meet demand, ensuring optimal use of an organization's capacity.
Productivity
The efficiency with which resources are used to produce goods and services.
Differentiation
The process of distinguishing a product or service from others to make it more attractive to a particular target market.
Tangibility
Tangibility refers to the physical nature of a product, distinct from services or digital products, which can be seen, touched, and owned physically.
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