# CpmAnalyst..::..ProbeBackward Method

Recursively traverses backward from a given vertex, adding the latest-possible
arrival time to each vertex as it goes.

**Namespace:**
Highpoint.Sage.Graphs.Analysis

**Assembly:**
Sage4 (in Sage4.dll)

## Syntax

#### Parameters

- vertex
- Type: Highpoint.Sage.Graphs..::..Vertex

The vertex from which the backward probing is to be done.

- elapsedTime
- Type: Int64

The time that has elapsed thus far in the backward traversal.