Workflow Complexity for Collaborative Interactions: Where are the
  Metrics? -- A Challenge
  In this paper, we introduce the problem of denoting and deriving the
complexity of workflows (plans, schedules) in collaborative, planner-assisted
settings where humans and agents are trying to jointly solve a task. The
interactions -- and hence the workflows that connect the human and the agents
-- may differ according to the domain and the kind of agents. We adapt insights
from prior work in human-agent teaming and workflow analysis to suggest metrics
for workflow complexity. The main motivation behind this work is to highlight
metrics for human comprehensibility of plans and schedules. The planning
community has seen its fair share of work on the synthesis of plans that take
diversity into account -- what value do such plans hold if their generation is
not guided at least in part by metrics that reflect the ease of engaging with
and using those plans?
