Human Factors Engineering

This NASA Handbook defines the NASA Human Factors Analysis and Classifications System (NASAHFACS) tool and provides guidance on the use of NASAHFACS. It illustrates the NASAHFACS model; describes the data gathering, coding, trending, and tracking process and outlines training and other related resources to support the practice of NASAHFACS throughout NASA. CLICK HERE for the…...

The conditions that increase the risk of violations can differ from those that produce errors. Violations are often associated with time pressure, poor procedures, poor supervision, and shortages of equipment or spares. The table below shows some reasons people gave for not following procedures in one study…. Membership Required You must be a member to...

Some error-producing conditions are more powerful than others.  The table below shows estimates of how different conditions create the risk of error. Poor instructions or procedures are said to triple the rate of error.  Lack of experience with the task is estimated to result in a 17-fold increase in the risk of error…. Membership Required...

If we aim to learn from the error and to lessen the chances of it happening again, we need to consider the organizational context that surrounds the person’s action, including equipment, procedures, people, the environment, and management. There are two aspects to managing error:… Membership Required You must be a member to access this content.View...

15 human error thoughts we need to consider during our next incident investigation and causal analysis:… Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here...

We see this often in our PHAs/HFA and audits… an emergency shutdown procedure would need an Olympic athlete to carry out before the LOPC event begins.  And to top it off, the operators we witness as those who would be expected to carry out this ESD SOP are “senior” operators who tend to be out…...

The main objective of any safety data collection and analysis system is to make events, hazards, safety trends, and their contributing factors VISIBLE and UNDERSTANDABLE so that the organization can take effective corrective action.  Generally, the same decision-making, communication breakdown, and distraction problems we see in a serious accident will also tend to see in…...

The control of human error requires two (2) different approaches.  First, it is necessary to MINIMIZE THE OCCURRENCE of errors, and the second is to REDUCE THE CONSEQUENCES of the remaining errors by… Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here...

To contain and control human error, one must first understand its nature. There are basic concepts associated with the nature of human error: the origins of errors can be fundamentally different, and the consequences of similar errors can also be significantly different. While some errors are due to carelessness, negligence, or poor judgment, others may…...

As we work on a project for a client, I am reminded of the stark contrast in HF expectations across industries.  Having grown up in the chemical industries managing PSM/RMP-covered processes, Human Factors (HF) has been “a thing” since 1992.  HF was very much a steep learning curve and still is for many.  I spent…...