Embed Size (px)
Citation preview
MATERIAL MANAGEMENT Materials management is an important
process. It is about how to reduce waste Improve productivity Follow a Sustainable development It is about how a building is designed and
how materials are estimated? It is about how materials are acquired and
how the packaging is specified.
MATERIAL MANAGEMENT It is about how the delivery schedule is
designed. It is about how contractors plan materials
use and how they manage previously used materials and cuts.
It is about how waste is managed for use elsewhere or recycling rather than being discarded in a landfill.
MATERIAL MANAGEMENT Often on site usable or reusable pieces of
material can be seen in a construction site. -Examples lighting ballasts, electrical switches plasterboards damaged under the rain/bad
handling/storage etc. Torn bags of cement, Broken tiles, bricks, blocks, various lengths of piping and conduit. And many more.
MATERIAL MANAGEMENTCost of Waste The cost of waste is more than simply the cost of getting it to a landfill and dumping it. The cost of waste is: Original cost of material Delivery cost Handling cost Management cost Cleanup cost Waste hauling cost Tipping fee=Total cost of construction waste
MATERIAL MANAGEMENTMaterials use materials reuse, reduction and recycling begins in the planning stages of a project.1. It starts with the architect, 2. proceeds through the engineer, the estimator,
the purchaser, 3. The construction manager4. finally the contractors.
MATERIAL MANAGEMENT Materials cost control often starts with a
plan. Once the material is on site and especially
once its been cut, it is too late to plan. With carefully well planned operational
procedures and construction practices, a plan can be developed and implemented to save significant costs in materials.
MATERIAL MANAGEMENT Researchers in the past have tried to
quantify the potential benefits of applying effective material management practice on commercial building practice.
Overall, they found that 25 site factors and conditions potentially affect productivity.
One of which is material management, this is shown diagrammatically in figure below.
Typical adverse material management (Thomas et al, 1989)
Poor organisation of storage area on site
Extensive multiple handling of materials
Material badly stored or marked
Poor House Keeping
Wastage on Site
Access to storage area obscured by debris
Lack of planning of material deliveries
Lack of co-ordination between the time of deliveries and erection.
Remobilization and re-familiarisation after a lengthy delay.
Running out of materials
Lack of anticipation about material shortage
MATERIAL MANAGEMENT Ineffective material management reduces
labour productivity. Material handling could be improved by
simple measures such a: organizing the delivering and storage of
materials in a sequential manner, the end result will improve productivity.
MATERIAL MANAGEMENT Researchers have tried to quantify the potential
benefits of applying material management practices on construction sites.
They carried out material management on a number of selected sites.
The projects were all constructed under similar conditions.
Only one project used material management technique.
All material related problems were identified, quantified, and linked to site material practice.
MATERIAL MANAGEMENT The number of work hours wasted was
calculated. The result of their study concluded that
work hour losses resulting from poor material management caused cost overrun of 18%.
MATERIAL MANAGEMENT The case study also showed that an
investment of £1100.00 in the field of material management would have saved £6300.00 in quantified disruption, a benefit/cost ratio of 5.7.
Material management involves organizing the storage area, delivery of materials, material handling and distribution.
MATERIAL MANAGEMENT The construction industry has a major
impact on the environment, both in terms of the resources it consumes and the waste it produces.
The construction industry is responsible for producing all kinds of wastes.
The amount and type of which depends on factors such as:
the stage of construction, type of construction work and practices on
site.
MATERIAL MANAGEMENT Over 90% of non -energy minerals
extracted in Great Britain are used to supply the construction industry with materials.
Every year more than 70 million tones of construction and demolition waste has been produced in England and Wales
MATERIAL MANAGEMENT-POLICY Reduce > Reuse > Recycle The construction industry is the UK’s
largest user of natural resources, and produces a large amounts of waste.
Everyone in the construction industry can contribute to tackling waste-by.
It is by reducing waste, using materials in a better way, with care.
Collecting waste for recycling.
MATERIAL MANAGEMENT
1. 400 MILLION TONNES of material is used
2. 100 MILLION TONNES of waste is produced – more than one-third of the UK’s annual waste
3. 25 MILLION TONNES of construction waste is disposed to landfill
MATERIAL MANAGEMENTWaste hierarchy1. Reuse2. Recycle3. Dispose Firstly, aim to reduce the amount of waste you
create. If waste is created, identify ways you can reuse
the materials. Finally, if materials cannot be reused then
collect them to recycle. Only dispose of waste as a last resort.
MATERIAL MANAGEMENT
Try to be involved early in a project to encourage designs that cause less waste to be created.
Use standard sizes and quantities of materials, and plan ahead to reduce off cuts.
Avoid over-ordering.
MATERIAL MANAGEMENT arrange deliveries to match work stages, avoid materials being stored on site longer
than necessary, ensure storage areas are safe, secure and
weatherproof, Minimise rework from errors and poor
workmanship.
MATERIAL MANAGEMENT Refuse poor quality or damaged deliveries. Don’t remove protective packaging from
materials before they are needed.RECOMMENDATIONS The site induction and toolbox talks are
opportunities to raise awareness of good waste management.
Having one person responsible for ordering materials helps avoid surplus being purchased.
MATERIAL MANAGEMENT Buying sand and gravel in bulk bags rather
than loose helps reduce wastage. Computer software is available to estimate
required quantities accurately.Your duty of care All businesses have a duty to ensure that
waste they produce is handled safely and within the law.
This is a duty of care we are all part of the process.
MATERIAL MANAGEMENT check that any company removing waste
from your site is a registered waste carrier, make sure that they take the waste to a
registered waste management site, If you do not check and it is illegally
disposed of, you could be held responsible.
MATERIAL MANAGEMENT Every load of waste that leaves your site
must be accompanied by a Waste Transfer Note.
This provides an accurate description of the waste to enable it to be treated safely.
Keep copies of all waste transfer notes for at least two years
MATERIAL MANAGEMENT
Site Waste Management Plans A Site Waste Management Plan (SWMP)
is a legal requirement in England for projects over £300,000.
It requires you to forecast and record waste and how it is managed.
MATERIAL MANAGEMENT Using the SWMP as a waste management
tool can help the company to:1. increase profit margins;2. reduce waste management costs;3. demonstrate compliance with your legal
obligations; and decrease the amount of waste you dispose of to landfill.
MATERIAL MANAGEMENT The true cost of waste is not just the cost
of hiring a skip. It also includes:1. the cost of the materials that end up as
waste;2. the labour cost to handle the waste on
site; and the cost of waste storage,3. transport, treatment and disposal.
MATERIAL MANAGEMENT1. Most of waste arises on the structure and
fitting stages of construction.2. BENCHMARK DATA
There are no agreed bench mark data available.
3. On going study at Centre for Research in the Built Environment is looking at the bench marking for waste minimisation.
MATERIAL MANAGEMENT-WASTE CONTROL
Environmentally friendly policy Step1-Sustainable development Step2-On site Material Management
Policy Step3-On site prevention policy Step4-On site reduction Step5-On site reuse Policy Step6-On site recovery Policy
MATERIAL MANAGEMENTNot recommended policy Off site reuse Off site recovery Wastes disposal to Landfill
MATERIAL MANAGEMENT
MATERIAL MANAGEMENTRECORD KEEPING Complete documentation of all contract
activities is an important part of material management.
These records provide an accurate record of:1. material testing, 2. Inspections3. work performed. They also provide proof of and support for the
decisions and actions taken. These records show that the contractual
obligations of the contractor have been fulfilled and the public’s funds have been properly spent.
MATERIAL MANAGEMENT These records show how the material
was used, what was the level of material wastage on site.
I twill provide valuable information on how to reduce waste and have a tight control on material management.
MATERIAL MANAGEMENTGood Recordkeeping Practices Keep records up-to-date, accurate, and
complete. This will save time throughout the process.-To achieve this: enter records on the day of the event, enter information in a manner so another person
could easily complete the entry, when needed, without additional instructions.
MATERIAL MANAGEMENT If % waste allowed is =5% a good record
keeping will show the level of waste for each activities.
If the waste for let us say activity 100-120 is 6.65% the good record keeping will demonstrate why waste was high for that activity.
Lesson can be learnt from waste increase. Waste and material management have strong
correlation.
MATERIAL MANAGEMENTRecordkeeping Policies and ProceduresResources Record the date first. Record verbal instructions and minor conditions. Weather conditions. Work in progress, including temporary erosion
control methods employed. Location of work (activity 1-2, 2-3,…) Contractors and subcontractor’s work force Arrival and departure of equipment
MATERIAL MANAGEMENT♦ Quantity of equipment and its usage at the
project for each activity.♦ Important instructions to the contractor.♦ Names of official visitors and a summary of
any discussions with the visitors♦ Unusual construction or work conditions♦ Decision making discussions with the
contractor♦ Disagreements with the contract
MATERIAL MANAGEMENT Detailed information that may have a connection
with a probable dispute or claim against the department
Project completion and final inspection Other important features of the project, such as
discussions concerning Disadvantaged Business Enterprise (DBE) and Equal
Opportunity (EEO) Record time suspension and reason Record resumption of work
MATERIAL MANAGEMENT Record all materials brought onto the project
even if they are material-on-hand and the date that the material arrived Record the date that Storm Water Inspections
were performed and any violation by the contractor of Project Specific Locations (PSLs)
in the ROW or within one mile of the project Record traffic control being used
MATERIAL MANAGEMENT Time inspector is on the project Credit Days – Enter reason for credit day
in Site Manager Daily Work Report (DWR) and Diary. (Exception for Saturday & Sunday – unless the contractor is working.)
MATERIAL MANAGEMENT NOTE: The Site Manager DWR contains 10
different categories on the first tab under ‘Remarks’
to record information. These categories are: • Accident • Contractor Work Hours • Dispute/Claim • EEO Issues • GENERAL
MATERIAL MANAGEMENT • General • Other • Safety Violations • Traffic and • Visitors. Records Management Resources from GSD Keeping good records does not mean keeping
all records indefinitely. The Records Management
Section of the General Services Division (GSD) provides guidance on general records
MATERIAL MANAGEMENT management issues on their website.
Information on the Records Retention Schedule is also
available. Specific information on District Construction Records can be accessed online. The
link to Division/Office Schedules of Unique Records include records maintained by the
Construction Division and other Divisions. To establish record retention practices that conform
to the standards described in these online resources, review of these sites is recommended.
MATERIAL MANAGEMENT Electronic Data Management Systems
(EDMS) Electronic Data Management Systems
(EDMS) will provide the department with a means of
maintaining project records that are not stored in Site Manager electronically. Several districts
MATERIAL MANAGEMENT and divisions now have EDMS to allow
storage of electronic records and allow scanning and
storing hard-copy records. Ideally, most, if not all, documentation will be electronically stored
from cradle to grave in the future.
Sequentialmanner storing
Materialstorage &
coding
Sustainabledevelopment
Improveproductivity
MaterialManagement
Reducewaste
Quantitysurveyors
(theestimator)
ArchitectsDesign
complexity
DeliveryJIT
If left over
Contractormaterialhandling
Useelsewhere
Or recyclingWork hour losses resulting from
poor material management causedcost overrun of 18%.
Reduce > Reuse > Recycle
Architects-Use standard sizesand quantities of materials,
and plan ahead toreduce off cuts.
Avoidover-ordering
CULTUREOF
WASTEREDUCTION
