An analytical method that uses deductive logic to guide thought process used to draw correct conclusions. LTA's are used to lay out the logic of systems to aid in human decision making, and are used extensively in root cause failure analysis(RCFA). Sometimes used interchangeable with fault tree analysis, but the later generally applies probabilities to determine causes.

Tip excerpted from: The Professional's Guide to Maintenance and Reliability Terminology by Ramesh Gulati, Jerry Kahn and Robert Baldwin