Construction Methods, Equipment and Operations - Concept Map
Construction Methods, Equipment and Operations
Related concepts
Equipment Productivity
Sub concepts
- Capacity per Cycle
- Cycles per Hour
- Efficiency Factor
- Bucket Fill Factor
- Output Formula
Relationship to central
Core foundation for calculating work output and efficiency
Fleet Matching and Optimization
Sub concepts
- Truck Cycle Time
- Load Time
- Haul Time
- Dump Time
- Return Time
- Number of Trucks Formula
Relationship to central
Critical for balancing trucks and loaders to minimize idle time and cost
Earthmoving Operations
Sub concepts
- Excavators
- Loaders
- Dozers
- Scrapers
- Haul Trucks
- Swell Factor
- Shrinkage Factor
- Bank Volume
- Loose Volume
- Compacted Volume
Relationship to central
Primary construction method involving soil movement and placement
Concrete Operations
Sub concepts
- Batching
- Mixing and Transport
- Placing and Consolidation
- Vibration
- Curing
- Formwork Design
- Falsework
- Fresh Concrete Pressure
Relationship to central
Major construction method for structural and architectural elements
Working Time and Efficiency
Sub concepts
- Working Minutes per Hour
- Job Conditions
- Management Efficiency
- Weather Delays
- Material Delays
Relationship to central
Modifying factor affecting all productivity calculations
Concept connections
- Equipment ProductivityCycles per HourDirect inverse relationship; cycle time (seconds) determines cycles per hour via 3600/t formula
- Equipment ProductivityEfficiency FactorMultiplier applied to theoretical output to reflect real-world working time and job conditions
- Efficiency FactorWorking Time and EfficiencyWorking minutes per hour and job conditions directly determine the efficiency multiplier (e.g., 50/60 = 0.833)
- Fleet Matching and OptimizationTruck Cycle TimeNumerator in the fleet matching formula N = Cycle Time / Load Time
- Fleet Matching and OptimizationEquipment ProductivityFleet size must match loader output to prevent idle time or queuing; both use same efficiency concepts
- Earthmoving OperationsEquipment ProductivityExcavators, loaders, dozers, and haul trucks each have specific productivity formulas applied to earthwork projects
- Earthmoving OperationsSwell FactorSwell increases loose volume beyond bank volume; directly affects truck capacity and haul distance calculations
- Earthmoving OperationsShrinkage FactorShrinkage reduces compacted volume below bank volume; determines bank volume needed for fill specifications
- Swell FactorBank VolumeStarting point for calculating loose volume; Vloose = Vbank × (1 + Swell)
- Shrinkage FactorCompacted VolumeEnding point for fill placement; Vbank = Vcompacted / (1 - Shrinkage)
- Concrete OperationsFresh Concrete PressureFormwork and falsework must be designed to resist the hydrostatic and dynamic pressure of fresh concrete
- Concrete OperationsFormwork DesignFormwork system is critical for concrete placement success; design must account for pressure, bracing, and reuse
- Equipment ProductivityBucket Fill FactorMultiplier for excavators and loaders accounting for partial filling or material rebound; typically 0.8 to 1.0
- Fleet Matching and OptimizationEarthmoving OperationsFleet matching is essential to optimize truck-loader systems in earthwork projects
- Working Time and EfficiencyEarthmoving OperationsWeather, material delays, and management conditions affect all earthmoving equipment output
- Working Time and EfficiencyConcrete OperationsConcrete operations are sensitive to weather (curing temperature, premature drying) and schedule delays
- Capacity per CycleBucket Fill FactorBucket capacity is multiplied by fill factor to get realistic capacity per cycle
- Load TimeEquipment ProductivityLoader's load time per truck cycle determines how many cycles per hour the loader can complete
- Haul TimeTruck Cycle TimeOne component of total truck cycle; depends on haul distance and road conditions
- Dump TimeTruck Cycle TimeOne component of total truck cycle; time to discharge load at destination
- Return TimeTruck Cycle TimeOne component of total truck cycle; empty return from dump site to loader
- ConsolidationConcrete OperationsVibration removes air voids and ensures concrete quality; critical phase in placement process
- CuringConcrete OperationsPost-placement process to maintain temperature and moisture for strength gain; affects schedule and quality
- BatchingConcrete OperationsFirst phase; precise measurement and mixing of materials to achieve specified concrete properties
- Mixing and TransportConcrete OperationsMiddle phase; concrete transported within slump-loss limits (typically 90 minutes for ready-mix)
- Placing and ConsolidationConcrete OperationsCritical phase where concrete is poured and compacted into formwork; quality depends on method and timing
- FalseworkFormwork DesignTemporary support system for formwork; must be engineered to resist all loads and prevent failure
Diagrams
Construction Methods, Equipment and Operations - Concept Hierarchy
Complete hierarchical overview of all major concepts in Construction Methods, Equipment and Operations, showing how equipment productivity, fleet matching, earthmoving, and concrete operations interconnect as integrated construction management disciplines.
Equipment Productivity Calculation Process
Step-by-step decision process for calculating equipment productivity, showing when to apply bucket fill factors, how to convert cycle times to cycles per hour, and how efficiency factors are integrated into the output formula.
Truck-Loader Fleet Matching Optimization
Decision process for determining optimal number of haul trucks to match a loader, including cycle time calculation, rounding logic to prevent loader starvation, and iterative economic optimization.
Soil Volume Conversions in Earthwork
Complete workflow for converting between bank, loose, and compacted volumes in earthwork, showing when to apply swell factors (excavation) and shrinkage factors (compaction), with typical ranges for different soil types.
Concrete Operations Sequence
Seven-phase sequence for concrete construction operations, from formwork design through curing and formwork removal, showing critical decision points for transport method and consolidation requirements.
Typical Sources of Construction Delays & Efficiency Loss
Distribution showing why a 50-minute working hour (instead of 60 minutes) is typical in construction, with breakdown of causes: weather delays, material delays, equipment failures, and management factors that reduce actual productive time.