Operations Notes – Process

Productivity = (Value of Outputs)/(Value of Inputs)

Cycle Time (CT) – time between completion of successive units (workstation, process)
Bottleneck (BN) – factor that limits production (longer cycle time, scarcest resource)
Capacity (C) – how much output can be produced in specified period of time
Flow Time (FT) – time it takes to get completely through a process, beginning to end
Utilization (U) – % of time spent actually working on product or performing service

• (what you get)/(what you pay for) = (work content)/(total available time)
• inversely proportional to variability (Demand)

Gantt Chart – a horizontal bar chart showing resource utilization over time

Process Design
Line Balancing – 1^st draw the Process Flow Diagram (PFD), then make the following chart:

Desire X Units ÷ Total Time ⇒ C_p [CT_p = 1/C_p]

Minimum # of Stations = Σ task times ÷ CT_p