European Transport Research Review,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: May 20, 2024
Abstract
Ensuring
the
reliability
of
railway
transportation
is
heavily
dependent
on
quality
its
infrastructure.
In
this
regard,
renewal
and
maintenance
track
infrastructure,
referred
to
as
trackwork,
play
a
vital
role.
However,
trackwork
execution
requires
temporary
capacity
restrictions
for
train
traffic.
Therefore,
harmonising
schedules
critical
but
challenging
accomplish
when
one
frequently
changing.
This
paper
explores
models
nature
schedule
instability
at
tactical
level
scheduling
process.
We
analyse
data
from
year
rolling
horizon
plans,
focusing
weekly
changes
eight
key
locations
across
Sweden’s
network.
Our
study
considers
various
factors
that
may
affect
stability,
such
type,
location,
time
day,
traffic
intensity,
type
prevailing
find
increases
plan
approaches
end.
The
regression
analysis
reveals
most
significant
predictors
in
include
previous
changes,
(single
vs.
double),
work
location
(at
station
between
stations),
timing
(daytime
nighttime
month).
These
provide
insights
planners
making
informed
proactive
decisions
about
timeslot
allocation.
Grey Systems Theory and Application,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 9, 2025
Purpose
This
paper
aims
to
propose
a
capacity
assessment
approach
for
production
with
uncertainty,
focusing
on
single
batch
machine
interval
grey
processing
time.
Design/methodology/approach
Based
the
number
and
its
mathematical
operations,
uncertain
time
is
defined
as
research
object.
The
times
generation
methods
are
then
developed,
which
rely
specific
definitions
historical
data.
A
tailored
this
mode
subsequently
proposed,
validity
demonstrated
through
multiple
real-world
cases
from
one
aerospace
composite
material
manufacturer.
Findings
proposed
provides
reliable
results
various
types
of
tasks.
For
tasks
small
jobs
or
significant
variations
in
job
sizes,
can
be
obtained
first
stage,
known
model
assessment.
remaining
tasks,
achieved
second
heuristic
Research
limitations/implications
In
paper,
validated
based
production.
To
enhance
applicability
more
actual
scenarios,
needs
extend
modes.
algorithm
have
certain
limitations
need
further
designed
suit
other
Originality/value
novel
And
it
helps
promote
application
system
theory
management.
International Transactions in Operational Research,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 25, 2025
Abstract
This
work
addresses
the
problem
of
assigning
preventive
maintenance
jobs
in
a
52‐week
planning
horizon.
Given
set
machines
that
need
maintenance,
these
machines,
teams,
and
horizon,
consists
each
job
to
team
given
instant
aiming
minimize
cost
with
teams
performing
unscheduled
using
outsourced
teams.
We
propose
an
iterated
local
search
(ILS)‐based
algorithm
specialized
for
this
problem.
Using
real
instances,
ILS
achieved
best
results
81%
outperforming
literature
algorithms.
However,
algorithms
only
treat
deterministic
version
do
not
consider
uncertainty
duration
may
occur
industry
environment.
Not
considering
aspect
can
produce
inefficient
schedule
many
jobs.
So,
also
proposes
simheuristic‐based
(SIM‐ILS)
capable
capturing
issue.
tested
it
three
scenarios,
which
differ
level
regarding
duration,
compared
their
those
provided
by
stochastically
evaluated
solutions.
SIM‐ILS
found
solution
61%
tests.
Therefore,
be
used
support
decision‐making
different
industrial
environments,
from
environments
low
variability
high
variability.
