Materials
to perform work come to maintenance from one of two
sources: either directly purchased or from an on-site
warehouse. Direct materials generally get bogged down
due to several problem areas:
· Poor specifications on file:
The current system is not updated to give the proper
information on the part required leading to excessive
time spent searching for this information
· Cumbersome approvals process:
When work is approved in many instances it requires
another approval to purchase the materials for the job
· Poor receiving practices:
Parts and materials are received without a reference
to a work order and are “lost” on the receiving
dock.
· Poor notification procedure:
Materials are received but poor communications between
maintenance and purchasing introduces delays in
applying the materials to the job.
Any of these will lead to less
then optimum response of the materials procurement
process causing undue delays in getting the job done.
Warehouse provided materials introduces a more complex
set of problems.
Facility warehouses generally
are poorly run. Most managers responsible for this
function have forgotten that they are serving two
masters. They must provide a good return on the
investment in this asset, and they must provide good
service levels for the maintenance department. The key
process measurements that gauge the effectiveness of
both are:
· Annual Inventory Turns: Total
annual issues from inventory divided by average annual
inventory value. This number should be between 3.0 and
3.5 turns per year. We usually find inventories
turning at less then 0.7 turns.
· Service Level: number of
items issued divided by number of items requested. A
service level of 97% is a good target. Eighty to
ninety percent is the range we find.
So why are these values so low?
Many factors the most common problems are one or more
of the following:
· There are no measuring
systems to gauge the performance. The measure we most
commonly see is inventory value.
· There is no plan in place to
improve inventory performance, as it is not viewed as
a contributor to poor maintenance efficiency, but
rather a cost problem.
· Obsolete parts are seldom
purged from the inventory. This clutters the warehouse
compounding space allocation problems for good parts.
· Stock levels are out of line
with demand. We find many cases of multi-year
quantities in the bins.
· The CMMS (if in place) has
not been updated with the proper specifications for
the parts or categorization of parts is complex making
it difficult to find items.
· Cycle counting is not
performed to match on hand records with on hand
quantities.
· Max/min levels have not been
adjusted since the parts were initially established.
· Security of the warehouse is
poor. Items are removed without notification to those
responsible for maintaining proper levels, driving
down the service level.
· There is no rationale for
establishing an item in the inventory.
· The reorder process is
cumbersome and ineffective.
· The location of the facility
has not been taken into account when the inventory was
established. A warehouse for two identical facilities
should vary greatly if one is located on Alaska’s
north slope versus one just outside of
Philadelphia’s metro area. Parts availability from
local suppliers should significantly drive down the
stocking requirements.
And the list goes on. The common
theme of poor performing warehousing operations is
complacency: it is not until we perform a “Day In
The Life Study” and develop the indicator values are
our clients fully aware of the impact poor materials
management has on their internal productivity.
In this brief space it is
difficult to get into much depth about this serious
problem, so I’ve highlighted the major themes.
Please contact me at SAMI
if you would like to discuss this further. As for me,
I’m heading out to the garage to continue my
search…
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