Studies
Studies
The longer pieces.
Everything under this heading
Measuring concurrency
Deriving the figure from records, and the two categories records will never contain.
Fitting a layer into an existing estate
What to establish first, and where these projects actually go wrong.
Locating a quality fault
Three metrics, three symptoms, and locating the fault by layer.
Layers
The layers these describe
Layer one
Connectivity
The outermost layer. Whether a call can happen at all.
Open Layer twoControl
Where a call goes, and what happens when nobody answers.
Open Layer threeNumbering
What a caller dials, and whether it can ever be unreachable.
Open Layer fourOperation
Change, treated as a layer because it causes more incidents than failure does.
Open