Materials Management Flashcards
Full Contents
1 Materials management life cycle
#2 Materials strategy and planning (estimating, budgeting, supplier evaluation, timeline planning including CPM, cashflow and risk management)
#3 Operations and management of materials (logistics management)
#4 Waste management
Overview of materials management
Read the steps and timing of materials management
02 key elements of material planning
Material planning
Time line planning - critical path, long lead items
Method of estimating
Center line method - for symmetrical buildings multiplying center line with depth and breath
Crossing method - for masonry walls L X B X internal dimensions of rooms
Out to Out and In to In - “long wall short wall” total of the dimensions of long wall followed by short wall
Service unit - cost of single unit x no of units
Bay method - for multiple bays or structures, cost of 01 bay x no of bays plus any additional cost
Materials budgeting and cost estimation
Incremental budgeting - use historical data as a baseline
Zero - based budgeting - start new budget without referring to the past
Cash - limited budgeting - decide what can be achieved with a set cash budget
Resource limited - sets budget based on restricted resources and materials
Activity based - allocated budget based on activities and materials required for it
Contingency budgeting - broad budget with contingencies included
Supplier evaluation
Risk factors
Supplier facility in developing countries
Suppliers with low evaluation ratings
High amounts of nonconformance in supplier facilities and processes
Critical path
The longest path in the schedule for completion
Fast tracking is running multiple tasks in parallel to reduce time
Crashing is putting additional resources to complete on time
Drag and Float
Activities that are not on the critical path are said to have total float or slack, i.e., the amount of time they can slip without making the project longer.
Conversely, only critical path activities and delays (such as lags or constraints have DRAG.
DRAG can be computed in the following manner:
If an activity has nothing in parallel, its DRAG is equal to its duration.
If an activity has other paths in parallel, its DRAG is whichever is less: its duration or the total float of the parallel activity with the least total float
Lead time
Amount of time between requesting work to be done and when the work is complete
Mobilization
Customer lead time - order confirmation and fulfilment
Material lead time
Production lead time
Cumulative lead time
Cashflow
Risk management
Logistics management
Delivery
Movement
Storage
Control
Disposal of waste
Methods of logistics management
Construction consolidation centers - Offsite warehouse or facilities for bulk storage of materials
Just In Time Delivery - JIT
Modern Methods of Construction / MMC - offsite manufacturing, assembly, transportation and on-site implementation
03 stages of logistics management
Transport to and from site
Site activities
Transport to end of life processes
Inventory control best practice
Carry safety stock
Use cloud based inventory management system
Cycle - count program - counts certain number of items in a certain number of areas rather than entire inventory
Use batch / lot tracking - follow supplier’s instruction on special storage requirements
