D Compass Deviation
Compass deviation refers to the error in a magnetic compass caused by local magnetic fields on the aircraft. This deviation can affect the accuracy of navigation if not corrected. Pilots use deviation cards to account for this error during flight.
Website: www.faa.gov/regulations_policies/handbooks_manuals/aviation/phak/chapter-16
DA/H Decision Altitude/Height (Relative to Threshold)
Decision Altitude/Height (DA/H) is the specific altitude or height during an instrument approach at which a pilot must decide whether to continue the approach or execute a missed approach. It is critical for safe landings under low-visibility conditions.
DA1 – Decision Altitude
Decision Altitude (DA) refers to the altitude at which a pilot must make a final decision to either land or abort the landing by initiating a go-around. This is a vital part of instrument landing systems, especially in low-visibility conditions.
Website: www.faa.gov/regulations_policies/handbooks_manuals/aviation
DA2 – Density Altitude
Density altitude is the altitude relative to the standard atmosphere conditions at which the air density is equivalent to the current air density. It’s a critical factor in aircraft performance, affecting lift, engine power, and propeller efficiency.
DA3 – Drift Angle
Drift angle refers to the angle between the heading of an aircraft and its actual flight path over the ground, caused by wind pushing the aircraft off its intended course. It is important for maintaining accurate navigation during flight.
DAB – Digital Audio Broadcasting
Digital Audio Broadcasting (DAB) is a technology for transmitting radio signals digitally rather than via analog methods. In the automotive industry, DAB is increasingly used in car radios, providing clearer sound, a wider range of channels, and additional data services.
Website: www.worlddab.org/what-is-dab
DAC – Department Approval Certificate
Department Approval Certificate (DAC) in Northern Ireland is issued by the Department for Infrastructure. It ensures that vehicles meet road safety standards and regulations, allowing them to be legally driven on public roads.
Website: www.nidirect.gov.uk/articles/mot-vehicle-testing
DAC – Dense Asphaltic Concrete
Dense Asphaltic Concrete (DAC) is a type of durable, weather-resistant pavement material used in road construction. Its high-density structure makes it ideal for heavily trafficked areas, ensuring longevity and low maintenance.
DAH – Design Approval Holder (EASA)
Design Approval Holder (DAH) is an entity that holds a certificate issued by the European Union Aviation Safety Agency (EASA), authorizing it to design, manufacture, and maintain specific types of aircraft or parts.
Website: www.easa.europa.eu
Daily Improvement
Daily Improvement refers to the practice of continuously seeking small improvements in processes on a daily basis. This concept encourages teams to regularly assess workflows and find ways to increase efficiency and reduce waste.
Daily Management
Daily Management in lean refers to the structured practice of monitoring and managing performance, quality, and operations on a day-to-day basis. This often includes daily stand-up meetings and visual management tools to track progress.
Daily Management Worksheet
Daily Management Worksheet is a tool used in lean organizations to track key performance indicators (KPIs) and progress on a daily basis. It helps teams focus on continuous improvement, making it easier to identify areas for optimization.
DAM – Designation of Approval Marks (Regulations)
Designation of Approval Marks refers to the regulatory marks applied to vehicles and components that certify their compliance with safety and performance standards, often in line with international or national regulations.
Website: www.unece.org/transport/standards
DAP – Diallyl Phthalate
Diallyl Phthalate (DAP) is a thermoset plastic known for its chemical resistance, electrical insulating properties, and dimensional stability. It is commonly used in molding compounds, coatings, and electronics.
DAPs – Downlink of Aircraft Parameters
Downlink of Aircraft Parameters (DAPs) refers to the transmission of real-time flight data from an aircraft to ground systems. This data can include speed, altitude, engine performance, and other critical information used for monitoring and safety purposes.
DAS – Data Acquisition System
Data Acquisition System (DAS) is used to collect, store, and analyze data from various sensors and instruments in automotive testing and development. These systems are crucial for understanding vehicle performance, safety, and efficiency.
DASCAR – Data Acquisition System for Crash Avoidance Research
DASCAR is a specialized data acquisition system developed for crash avoidance research, collecting data from vehicle sensors, cameras, and other devices to analyze driver behavior and vehicle dynamics in crash situations.
Dashboard (Lean Management)
Dashboard in lean management is a visual tool used to monitor key performance indicators (KPIs) and project progress in real-time. Dashboards provide an at-a-glance view of operational performance, helping teams focus on continuous improvement.
Data
Data in lean management refers to the quantitative and qualitative information gathered to measure performance, efficiency, and quality. This data is critical for informed decision-making and for driving process improvements.
Data Aversion Disease
Data Aversion Disease in lean management refers to the reluctance of individuals or organizations to collect, analyze, or use data in decision-making. This resistance can hinder the ability to make informed improvements and lead to inefficiencies
Data Collection
Data Collection in lean management is the process of systematically gathering information to measure performance and identify areas for improvement. This data helps organizations understand their processes and make data-driven decisions to enhance efficiency.